CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED SERIES EQUITY & STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Series A Convertible Preferred Stock	Series B Convertible Preferred Stock	Common Stock	Additional Paid-in-Capital	Retained Earnings	Accumulated Other Comprehensive Income	Treasury Stock
Temporary equity, beginning balance, shares at Dec. 31, 2019		13,812,500
Temporary equity, beginning balance at Dec. 31, 2019		$ 4,250
Beginning balance, shares at Dec. 31, 2019				42,066,700
Beginning balance at Dec. 31, 2019	$ 22,998			$ 421	$ 16,723	$ 9,732	$ 6	$ (3,884)
Net income (loss)	(667)					(667)
Issuance of common stock, shares				243,825
Issuance of common stock	1,346			$ 2	1,344
Common stock repurchase, shares				(41,667)
Common stock repurchase	(231)							(231)
Issuance of series B convertible preferred stock, net of issuance costs, shares			6,608,700
Issuance of series B convertible preferred stock, net of issuance costs			$ 36,030
Series B convertible preferred stock dividend			$ 333
Series B convertible preferred stock dividend, permanent equity	(333)					(333)
Options exercised, shares				2,259,585
Options exercised	210			$ 23	187
Foreign currency translation	(76)						(76)
Stock-based compensation	1,233				1,233
Temporary equity, ending balance, shares at Sep. 30, 2020		13,812,500	6,608,700
Temporary equity, ending balance at Sep. 30, 2020		$ 4,250	$ 36,363
Ending balance, shares at Sep. 30, 2020				44,528,443
Ending balance at Sep. 30, 2020	24,480			$ 446	19,487	8,732	(70)	(4,115)
Temporary equity, beginning balance, shares at Jun. 30, 2020		13,812,500
Temporary equity, beginning balance at Jun. 30, 2020		$ 4,250
Beginning balance, shares at Jun. 30, 2020				43,188,445
Beginning balance at Jun. 30, 2020	20,189			$ 432	19,051	5,257	(436)	(4,115)
Net income (loss)	3,808					3,808
Issuance of series B convertible preferred stock, net of issuance costs, shares			6,608,700
Issuance of series B convertible preferred stock, net of issuance costs			$ 36,030
Series B convertible preferred stock dividend			$ 333
Series B convertible preferred stock dividend, permanent equity	(333)					(333)
Options exercised, shares				1,339,998
Options exercised	85			$ 14	71
Foreign currency translation	366						366
Stock-based compensation	365				365
Temporary equity, ending balance, shares at Sep. 30, 2020		13,812,500	6,608,700
Temporary equity, ending balance at Sep. 30, 2020		$ 4,250	$ 36,363
Ending balance, shares at Sep. 30, 2020				44,528,443
Ending balance at Sep. 30, 2020	24,480			$ 446	19,487	8,732	(70)	(4,115)
Temporary equity, beginning balance, shares at Dec. 31, 2020		13,812,500	6,608,700
Temporary equity, beginning balance at Dec. 31, 2020		$ 4,250	$ 36,842
Beginning balance, shares at Dec. 31, 2020				46,738,540
Beginning balance at Dec. 31, 2020	30,393			$ 467	22,107	12,418	823	(5,422)
Net income (loss)	(7,518)					(7,518)
Issuance of common stock, shares				151,515
Issuance of common stock	1,000			$ 1	999
Common stock repurchase, shares				(85,049)
Common stock repurchase	(561)							(561)
Issuance of series B convertible preferred stock, net of issuance costs			$ 1,516
Series B convertible preferred stock dividend, permanent equity	$ (1,516)					(1,516)
Options exercised, shares	234,205			234,206
Options exercised	$ 443			$ 2	441
Foreign currency translation	(575)						(575)
Stock-based compensation	2,747				2,747
Temporary equity, ending balance, shares at Sep. 30, 2021		13,812,500	6,608,700
Temporary equity, ending balance at Sep. 30, 2021		$ 4,250	$ 38,358
Ending balance, shares at Sep. 30, 2021				47,039,212
Ending balance at Sep. 30, 2021	24,413			$ 470	26,294	3,384	248	(5,983)
Temporary equity, beginning balance, shares at Jun. 30, 2021		13,812,500	6,608,700
Temporary equity, beginning balance at Jun. 30, 2021		$ 4,250	$ 37,784
Beginning balance, shares at Jun. 30, 2021				46,969,305
Beginning balance at Jun. 30, 2021	29,092			$ 470	25,171	9,065	369	(5,983)
Net income (loss)	(5,107)					(5,107)
Series B convertible preferred stock dividend			$ 574
Series B convertible preferred stock dividend, permanent equity	(574)					(574)
Options exercised, shares				69,907
Options exercised	91				91
Foreign currency translation	(121)						(121)
Stock-based compensation	1,032				1,032
Temporary equity, ending balance, shares at Sep. 30, 2021		13,812,500	6,608,700
Temporary equity, ending balance at Sep. 30, 2021		$ 4,250	$ 38,358
Ending balance, shares at Sep. 30, 2021				47,039,212
Ending balance at Sep. 30, 2021	$ 24,413			$ 470	$ 26,294	$ 3,384	$ 248	$ (5,983)