|
Shareholders' Equity (Narrative) (Details) (USD $)
|
3 Months Ended |
12 Months Ended |
|
Mar. 31, 2013
|
Mar. 31, 2012
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
| Shares of common stock reserved for issuance |
|
|
750,000 |
|
|
| Awards available for issuance |
|
|
611,692 |
|
|
| Proceeds from exercise of options |
|
|
$ 822,969 |
|
|
| Proceeds from exercise of warrants |
|
|
472,819 |
|
26,233 |
| Stock and option compensation |
1,841,000 |
424,000 |
2,545,060 |
873,888 |
719,811 |
|
Common Stock [Member]
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
| Number of options exercised |
|
|
179,983 |
|
60,382 |
|
Restricted Stock [Member]
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
| Restricted common stock granted |
|
|
282,900 |
363,200 |
|
| Market value per share on the date of grant |
|
|
$ 3.70 |
$ 3.38 |
|
| Unvested shares |
|
|
611,692 |
218,733 |
90,667 |
| Unamortized compensation costs |
|
|
758,000 |
|
|
| Unamortized compensation costs, period for recognition |
|
|
24 months |
|
|
|
Restricted Stock [Member] | Vesting Ratably [Member]
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
| Award vesting period |
|
|
36 months |
36 months |
36 months |
| Restricted common stock granted |
|
|
188,000 |
261,600 |
136,000 |
|
Restricted Stock [Member] | Director [Member]
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
| Restricted common stock granted |
|
|
91,500 |
96,500 |
63,000 |
| Market value per share on the date of grant |
|
|
|
|
$ 5.20 |
|
Restricted Stock [Member] | Employees [Member]
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
| Restricted common stock granted |
|
|
|
|
139,000 |
| Market value per share on the date of grant |
|
|
|
|
$ 5.20 |
|
Restricted Stock [Member] | Employees [Member] | Vesting Immediately [Member]
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
| Restricted common stock granted |
|
|
3,400 |
5,100 |
3,000 |
|
Employee Stock Option [Member]
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
| Number of options granted |
|
|
499,700 |
|
|
| Options granted, weighted-average exercise price per share |
|
|
$ 5.26 |
|
|
| Number of options exercised |
|
|
72,500 |
|
85,000 |
| Proceeds from exercise of options |
|
|
322,475 |
|
|
| Option expiration period |
|
|
10 years |
|
|
| Stock and option compensation |
|
|
1,431,620 |
|
|
|
Employee Stock Option [Member] | Employee [Member]
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
| Fair market value of options exercised |
|
|
|
|
276,750 |
| Number of options exercised |
|
|
|
|
75,000 |
| Number of options forfeited |
|
|
|
|
29,270 |
| Proceeds from exercise of options |
|
|
|
|
39,744 |
|
Non-Employee Stock Options and Warrants [Member]
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
| Number of options granted |
|
|
|
807,846 |
|
| Options granted, weighted-average exercise price per share |
|
|
|
$ 5.12 |
|
| Number of options exercised |
|
|
107,483 |
|
4,652 |
| Number exercisable |
|
|
1,365,870 |
|
|
| Weighted-average exercise price per share, exercisable |
|
|
$ 5.60 |
|
|
| Stock and option compensation |
|
|
$ 174,320 |
$ 4,690 |
$ (16,974) |
|
Non-Employee Stock Options and Warrants [Member] | Consultant [Member]
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
| Award vesting period |
|
|
|
24 months |
|
| Number of options granted |
|
|
|
60,000 |
|
| Options granted, weighted-average exercise price per share |
|
|
|
$ 3.95 |
|
|
Minimum [Member] | Non-Employee Stock Options and Warrants [Member]
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
| Option expiration period |
|
|
5 years |
|
|
|
Maximum [Member] | Non-Employee Stock Options and Warrants [Member]
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
| Option expiration period |
|
|
10 years |
|
|
|
July and August Investor Warrants [Member]
|
|
|
|
|
|
| Class of Warrant or Right [Line Items] |
|
|
|
|
|
| Term of warrants |
|
|
5 years |
|
|
| Exercise price of warrants |
|
|
4.45 |
|
|
| Exercise price of warrants, as a percentage of offering price |
|
|
150.00% |
|
|
|
October Investor Warrants [Member]
|
|
|
|
|
|
| Class of Warrant or Right [Line Items] |
|
|
|
|
|
| Term of warrants |
|
|
5 years |
|
|
| Exercise price of warrants |
|
|
6.73 |
|
|
| Exercise price of warrants, as a percentage of offering price |
|
|
150.00% |
|
|