Stock Plans, Share-Based Payments and Warrants (Details Narrative) - USD ($)
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12 Months Ended |
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Dec. 23, 2015 |
Sep. 29, 2015 |
Mar. 21, 2014 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 18, 2015 |
Nov. 10, 2014 |
Jan. 07, 2014 |
Dec. 31, 2013 |
Mar. 10, 2011 |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Options outstanding |
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4,303,638
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2,472,234
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2,410,134
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| Stock options granted |
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2,911,829
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352,519
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| Share-based compensation expense |
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$ 328,000
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$ 421,000
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| Fair value of options vested |
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$ 234,000
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$ 507,000
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| Weighted-average fair value of options granted |
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$ 0.56
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$ 0.45
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| Share-based compensation arrangement by share-based payment award, options, outstanding, intrinsic value |
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$ 0
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$ 241,000
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| Share-based compensation arrangement by share-based payment award, options, vested and expected to vest, outstanding, aggregate intrinsic value |
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$ 0
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$ 235,000
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| Share-based compensation arrangement by share-based payment award, options, vested and expected to vest, outstanding, weighted average remaining contractual term |
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8 years 6 months
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7 years 6 months
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| Employee service share-based compensation, nonvested awards, compensation not yet recognized, stock options |
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$ 1,174,000
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| Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition |
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3 years 6 months
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| Employee service share-based compensation, nonvested awards, compensation recognized at the time of certain performance conditions met |
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$ 158,000
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| Class of warrant or right exercise price |
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$ 0.57
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$ 0.33
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$ 0.60
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$ 0.30
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| Stock based compensation recognized amortization cost |
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$ 1,016,000
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| Class of warrant or right, number of securities called by warrants or rights |
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5,008,689
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| Warrants exercised |
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2,451,000
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$ 15,000
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| Deemed dividend |
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$ 73,000
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| Additional shares not issued results of warrants exercised |
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30
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9
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| Warrants exercised |
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791,278
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| Stock issued during period, shares, new issues |
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7,140,823
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36,570
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| Lambda Warrants [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Class of warrant or right, number of securities called by warrants or rights |
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2,127
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| Warrants exercised |
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$ 851
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| Restricted Stock [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Stock options granted |
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617,795
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132,077
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| Share-based compensation expense |
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$ 161,000
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$ 109,000
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| Weighted-average fair value of options granted |
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$ 0.48
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$ 0.86
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| Employee service share-based compensation, nonvested awards, compensation not yet recognized, stock options |
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$ 39,000
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| Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition |
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6 months
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| Rights Offering Warrants [Member] | Investor [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Class of warrant or right exercise price |
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$ 0.40
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| Class of warrant or right, number of securities called by warrants or rights |
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2,226,112
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| Rights Offering Warrants [Member] | Lambda Warrants [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Class of warrant or right exercise price |
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$ 0.40
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| Class of warrant or right, number of securities called by warrants or rights |
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2,782,577
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| 2011 Warrants [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Class of warrant or right, number of securities called by warrants or rights |
3,442,521
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| Gross proceeds from warrants exercise |
$ 688,000
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| Warrants exercised under cashless exercise provision |
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$ 0.20
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| Class of warrant or right, date from which warrants or rights exercisable |
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Dec. 18, 2015
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| Warrants exercised |
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$ 0
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| 2015 Equity Incentive Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Number of shares reserved and authorized for awards |
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7,000,000
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| Options expire date |
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Aug. 14, 2025
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| 2015 Equity Incentive Plan [Member] | Employee Stock Option [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Options outstanding |
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2,795,693
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| Stock option plan terms and description |
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The options issued to employees expire on various dates between May 7, 2025 and December 17, 2025
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| Shares available for future grants |
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3,470,376
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| Stock option vesting term description |
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Options currently outstanding are fully vested or will vest upon a combination of the following: immediate vesting, performance-based vesting or straight line vesting of two or four years.
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| Stock options granted |
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2,795,693
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| Stock options will vest upon the specified performance condition is met |
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327,629
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| 2015 Equity Incentive Plan [Member] | Employee Stock Option [Member] | Option and Resteicted Stock [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Shares available for future grants |
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3,470,376
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| 2015 Equity Incentive Plan [Member] | Non Employee Stock Options [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Options outstanding |
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116,136
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| 2015 Equity Incentive Plan [Member] | Maximum [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Stock options contractual term |
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10 years
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| 2004 Stock Incentive Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Shares available for future grants |
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2,054,799
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| 2004 Stock Incentive Plan [Member] | Non Employee Stock Options [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Options outstanding |
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903,709
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| Stock option plan terms and description |
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options expire at various dates between April 26, 2015 and November 17, 2024, and vest upon a combination of the following: immediate vesting or straight line vesting of two or four years.
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| 2004 Stock Incentive Plan [Member] | Employee Stock Option [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Options outstanding |
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488,600
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1,236,975
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| Stock option plan terms and description |
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The options expire on various dates between January 5, 2016 and February 5, 2024
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The options expire on various dates between April 27, 2015 and February 5, 2024, and have vested or will vest upon a combination of the following: immediate vesting or straight line vesting of two or four years.
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| 2004 Stock Incentive Plan [Member] | Non Employee Stock Options [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Options outstanding |
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903,209
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| Stock option plan terms and description |
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options expire at various dates between January 5, 2016 and November 17, 2024
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