CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total		Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Balances at beginning of period at Dec. 31, 2021	$ 46,258		$ 15	$ 351,394	$ (304,107)	$ (1,044)
Balances at beginning of period (in shares) at Dec. 31, 2021			15,532,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock from vesting of restricted stock units (Note 7)			11,000
Tax withholding related to vesting of restricted stock units	(29)			(29)
Stock-based compensation expense	883			883
Net loss	(1,999)				(1,999)
Foreign currency translation adjustments	3					3
Balances at end of period at Mar. 31, 2022	45,116		$ 15	352,248	(306,106)	(1,041)
Balances at end of period (in shares) at Mar. 31, 2022			15,543,000
Balances at beginning of period at Dec. 31, 2021	46,258		$ 15	351,394	(304,107)	(1,044)
Balances at beginning of period (in shares) at Dec. 31, 2021			15,532,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(18,227)
Balances at end of period at Dec. 31, 2022	32,714	[1]	$ 17	355,996	(322,334)	(965)
Balances at end of period (in shares) at Dec. 31, 2022			17,226,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock from vesting of restricted stock units (Note 7)			14,000
Tax withholding related to vesting of restricted stock units	(10)			(10)
Stock-based compensation expense	1,069			1,069
Net loss	(5,783)				(5,783)
Foreign currency translation adjustments	(5)					(5)
Balances at end of period at Mar. 31, 2023	$ 27,985		$ 17	$ 357,055	$ (328,117)	$ (970)
Balances at end of period (in shares) at Mar. 31, 2023			17,240,000

[1] Derived from the Company’s audited consolidated financial statements as of December 31, 2022.