Subsequent Event - Additional Information (Detail) |
Aug. 10, 2015
USD ($)
|
Jul. 29, 2015
$ / shares
|
May. 12, 2015
USD ($)
|
May. 06, 2015
USD ($)
|
Mar. 09, 2012
$ / shares
|
Jun. 30, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
Dec. 31, 2013
USD ($)
|
|---|---|---|---|---|---|---|---|---|
| Subsequent Event [Line Items] | ||||||||
| Convertible preferred stock, conversion price | $ / shares | $ 60.00 | |||||||
| Related party payable | $ 2,285,000 | $ 11,000 | $ 21,000 | |||||
| Co-Chairman and Chief Executive Officer [Member] | ||||||||
| Subsequent Event [Line Items] | ||||||||
| Annual interest rate | 0.50% | 0.45% | ||||||
| Maturity date | Aug. 10, 2015 | May 15, 2015 | ||||||
| Related party payable | $ 2,000,000 | $ 262,000 | ||||||
| Related Party Transaction, Description | The principal amount under the Note accrues interest at a rate of One Half of One Percent (0.50%) per annum. The Note is due and payable August 10, 2015, but may be pre-paid by the Company without penalty at any time. See Note 12, Subsequent Events. | The Loan accrues interest at the annual rate of Forty-Five One-Hundredths Percent (0.45%) from the date the Loan was made until the Loan is paid in full, whether at maturity, by prepayment, or otherwise. | ||||||
| Co-Chairman and Chief Executive Officer [Member] | Unsecured Non Convertible Promissory Note [Member] | ||||||||
| Subsequent Event [Line Items] | ||||||||
| Non-convertible promissory note, principal amount | $ 2,262,000 | |||||||
| Subsequent Event [Member] | ||||||||
| Subsequent Event [Line Items] | ||||||||
| Reverse stock split ratio | 0.0067 | |||||||
| Subsequent Event [Member] | Co-Chairman and Chief Executive Officer [Member] | ||||||||
| Subsequent Event [Line Items] | ||||||||
| Related party payable | $ 300,000 | |||||||
| Related Party Transaction, Description | The principal amount under the Note accrues interest at a rate of One Half of One Percent (0.50%) per annum. The Note is due and payable September 10, 2015, but may be pre-paid by the Company without penalty at any time | |||||||
| Subsequent Event [Member] | Co-Chairman and Chief Executive Officer [Member] | Unsecured Non Convertible Promissory Note [Member] | ||||||||
| Subsequent Event [Line Items] | ||||||||
| Non-convertible promissory note, principal amount | $ 2,562,000 | |||||||
| Annual interest rate | 50.00% | |||||||
| Maturity date | Sep. 10, 2015 | |||||||
| Subsequent Event [Member] | Series H Preferred Stock [Member] | ||||||||
| Subsequent Event [Line Items] | ||||||||
| Convertible preferred stock, conversion price | $ / shares | $ 1.7933 |