Consolidated Statements of Stockholders’ Equity (Unaudited) - USD ($)	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Treasury Stock
Beginning balance (shares) at Dec. 31, 2018		3,853,909
Beginning balance at Dec. 31, 2018	$ 391,533,000	$ 39,000	$ 504,178,000	$ (109,638,000)	$ (3,046,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issuance costs	(177,000)	$ 0	(177,000)
Stock-based compensation	387,000		387,000
Net loss	(2,373,000)			(2,373,000)
RSUs vested, net of shares withheld for taxes (shares)		0
Ending balance (shares) at Mar. 31, 2019		3,853,909
Ending balance at Mar. 31, 2019	389,370,000	$ 39,000	504,388,000	(112,011,000)	(3,046,000)
Beginning balance (shares) at Dec. 31, 2019		3,812,050
Beginning balance at Dec. 31, 2019	331,596,000	$ 38,000	505,831,000	(170,426,000)	(3,847,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
RSUs vested, net of shares withheld for taxes	$ (26,000)	$ 11,941
Purchase of treasury stock (shares)	(14,443)
Purchase of treasury stock	$ (66,000)				(66,000)
Stock-based compensation	570,000		570,000
Net loss	$ (28,223,000)			(28,223,000)
Ending balance (shares) at Mar. 31, 2020	3,809,548	3,809,548
Ending balance at Mar. 31, 2020	$ 303,851,000	$ 38,000	$ 506,375,000	$ (198,649,000)	$ (3,913,000)