CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($)	Common Shares [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]	Convertible Preferred Stock [Member]	Total
Balance at Dec. 31, 2018	$ 0	$ 179,503,000	$ (45,000)	$ (175,640,000)	$ 0	$ 3,818,000
Balance (in shares) at Dec. 31, 2018	769,890				0
Release of restricted common stock	$ 0	(65,000)	0	0	$ 0	(65,000)
Release of restricted common stock (in shares)	6,193,000				0
Issuance of warrants for common stock	$ 0	0	0	0	$ 0	0
Issuance of warrants for common stock (in shares)	0				0
Currency translation adjustment	$ 0	0	(11,000)	0	$ 0	(11,000)
Net loss	0	0	0	(2,565,000)	0	(2,565,000)
Balance at Mar. 31, 2019	$ 0	179,438,000	(56,000)	(178,205,000)	$ 0	1,177,000
Balance (in shares) at Mar. 31, 2019	776,083				0
Balance at Dec. 31, 2019	$ 0	188,320,000	(48,000)	(187,678,000)	$ 517,000	594,000	[1]
Balance (in shares) at Dec. 31, 2019	1,245,238				250,000
Issuance of common stock and warrants, net of offering costs	$ 0	725,000	0	0	$ 0	725,000
Issuance of common stock, net of issuance costs (in shares)	91,062
Issuance of common stock in connection with notes payable	$ 0	4,000	0	0	$ 0	4,000
Issuance of common stock in connection with notes payable (in shares)	500				0
Issuance of warrants in connection with convertible notes payable	$ 0	630,000	0	0	$ 0	630,000
Convertible preferred stock dividend	0	(20,000)	0	0	20,000	(20,000)
Stock-based compensation expense	$ 0	75,000	0	0	$ 0	75,000
Stock compensation expense (in shares)	2,000				0
Restricted awards cancelled	$ 0	0	0	0	$ 0	0
Restricted awards cancelled (in shares)	(550,000)				0
Release of restricted common stock	$ 0	0	0	0	$ 0	0
Release of restricted common stock (in shares)	353				0
Issuance of warrants for common stock, in connection with convertible preferred stock offering (in shares)					0
Net loss	$ 0	0	0	(2,680,000)	$ 0	(2,680,000)
Balance at Mar. 31, 2020	$ 0	$ 189,734,000	$ (48,000)	$ (190,358,000)	$ 537,000	$ (672,000)
Balance (in shares) at Mar. 31, 2020	1,338,603				250,000

[1] The condensed consolidated balance sheet as of December 31, 2019 was derived from the audited consolidated balance sheet as of that date.