Condensed Consolidated Statement of Stockholders' Equity (Deficit) - 3 months ended Mar. 31, 2017 - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
Beginning balance at Dec. 31, 2016	$ (45,525)	$ 4	$ (293)	$ (45,236)
Beginning balance, shares at Dec. 31, 2016		2,620,803
Repurchase of common stock	(56)		(56)
Repurchase of common stock, shares		(7,500)
Common stock issued to convertible note payable holders	2,016		2,016
Common stock issued to convertible note payable holders, shares		165,000
Issuance of warrants	549		549
Modification of warrants	371		371
Beneficial conversion feature	554		554
Stock-based compensation expense	125		125
Issuance of restricted stock	0	$ 0	0	0
Issuance of restricted stocks, shares		1,500
Accretion of redeemable convertible preferred stock	(1,073)			(1,073)
Net loss	(5,847)			(5,847)
Ending balance at Mar. 31, 2017	$ (48,886)	$ 4	$ 3,266	$ (52,156)
Ending balance, shares at Mar. 31, 2017		2,779,803