Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($)	Preferred Stock [Member] Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2014	98,354,541	18,494,023
Balance at Dec. 31, 2014	$ 38,213,000
Balance at Dec. 31, 2014		$ 18		$ (43,135)	$ (43,117)
Reclassification from temporary equity to permanent equity (in shares)	(98,354,541)
Reclassification from temporary equity to permanent equity	$ (38,213,000)
Permanent equity, reclassified from temporary equity (in shares)	98,354,541
Permanent equity, reclassified from temporary equity	$ 38,213,000				38,213,000
Conversion of convertible notes (in shares)	12,075,610
Conversion of convertible notes	$ 7,781,000				7,781,000
Exercise of convertible preferred stock warrants for series D preferred shares (in shares)	67,884
Exercise of convertible preferred stock warrants for series D preferred shares	$ 34,000				34,000
Exercise of convertible preferred stock warrants for series F preferred shares (in shares)	2,479
Exercise of convertible preferred stock warrants for series F preferred shares	$ 2,000				2,000
Exercise of stock options (in shares)		453,513
Exercise of stock options		$ 1,000	$ 58,000		59,000
Share-based compensation			283,000		283,000
Net loss				(6,697,000)	(6,697,000)
Balance (in shares) at Dec. 31, 2015	110,500,514	18,947,536
Balance at Dec. 31, 2015	$ 46,030,000	$ 19,000	341,000	(49,832,000)	(3,442,000)
Conversion of convertible notes (in shares)		97,093,236
Conversion of convertible notes		$ 97,000	12,059,000		$ 12,156,000
Exercise of stock options (in shares)		161,521			161,521
Exercise of stock options			22,000		$ 22,000
Share-based compensation			942,000		942,000
Net loss				(10,310,000)	(10,310,000)
Balance (in shares) at Dec. 31, 2016		457,575,631
Balance at Dec. 31, 2016		$ 458,000	80,266,000	$ (60,142,000)	20,582,000
Exchange of convertible preferred stock warrants to common stock (in shares)		129,683
Exchange of convertible preferred stock warrants to common stock			25,000		25,000
Reclassification of convertible shareholder notes derivative liability			2,268,000		2,268,000
Conversion of preferred stock into common stock (in shares)	(110,500,514)	110,500,514
Conversion of preferred stock into common stock	$ (46,030,000)	$ 111,000	45,919,000
Issuance of common stock upon reverse merger (in shares)		230,743,141
Issuance of common stock upon reverse merger		$ 231,000	$ 18,690,000		$ 18,921,000