Condensed Consolidated Statements of Stockholders' Equity (Deficit) - 9 months ended Sep. 30, 2016 - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Total
Balances at Dec. 31, 2015	$ 4	$ 219,319	$ (213,591)	$ 5,732
Balances (in shares) at Dec. 31, 2015	4,450,994
Issuance of common stock to officer and directors	$ 1	1,451		1,452
Issuance of common stock to officer and directors, shares	323,155
Issuance of common stock, net of issuance costs	$ 7	10,125		10,132
Issuance of common stock, net of issuance costs, shares	7,147,035
Issuance of common stock in settlement of litigation	$ 1	(1)
Issuance of common stock in settlement of litigation, shares	631,358
Issuance of warrants in connection with acquisition of licenses		272		272
Conversion of notes payable and related accrued interest and fees to common stock	$ 2	3,385		3,387
Conversion of notes payable and related accrued interest and fees to common stock, shares	2,350,480
Beneficial conversion feature		484		484
Stock-based compensation expense		317		317
Comprehensive loss			(21,961)	(21,961)
Balances at Sep. 30, 2016	$ 15	$ 235,352	$ (235,552)	$ (185)
Balances (in shares) at Sep. 30, 2016	14,903,022