Consolidated Statements of Changes in Shareholders' Deficit - USD ($) $ in Thousands	Total	Common Stock	Preferred Stock	Additional Paid-in Capital	Accumulated Deficit
Balance beginning, common stock (in shares) at Dec. 31, 2016		2,366,000
Balance beginning, preferred stock (in shares) at Dec. 31, 2016			0
Balance beginning at Dec. 31, 2016	$ (10,471)	$ 2	$ 0	$ 69,702	$ (80,175)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense (in shares)		30,000
Share-based compensation expense	57			57
Preferred stock issuance (exchange of promissory notes) (in shares)			133,000
Preferred stock issuance (exchange of promissory notes)	13,255			13,255
Preferred stock 4-for-1 stock split (in shares)			398,000
Net loss	(8,677)				(8,677)
Dividend on preferred stock	(407)			(407)
Preferred dividend PIK (paid) (in shares)			16,000
Preferred dividend PIK (paid)	$ 407			407
Balance ending, common stock (in shares) at Dec. 31, 2017	2,366,219	2,396,000
Balance ending, preferred stock (in shares) at Dec. 31, 2017	546,466		547,000
Balance ending at Dec. 31, 2017	$ (5,836)	$ 2	$ 0	83,014	(88,852)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense (in shares)		70,000
Share-based compensation expense	81			81
Net loss	(3,516)				(3,516)
Dividend on preferred stock accrued	(449)			(449)
Dividend on preferred stock	(1,267)			(1,267)
Preferred dividend PIK (paid) (in shares)			50,000
Preferred dividend PIK (paid)	$ 1,268		$ 1	1,267
Balance ending, common stock (in shares) at Dec. 31, 2018	2,466,219	2,466,000
Balance ending, preferred stock (in shares) at Dec. 31, 2018	597,139		597,000
Balance ending at Dec. 31, 2018	$ (9,719)	$ 2	$ 1	$ 82,646	$ (92,368)