Condensed Consolidated Statements of Changes in Stockholders’ Equity (Deficit) - USD ($) $ in Thousands	Redeemable Convertible Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive (loss) Income	Accumulated Deficit	Total
Balance at beginning of period at Dec. 31, 2018	$ 16,746		$ 2,266	$ 2	$ (15,554)	$ (13,286)
Balance at beginning of period (shares) at Dec. 31, 2018	4,801,020	5,166,812
Increase (Decrease) in Stockholders' Equity
Stock–based compensation			60			60
Foreign currency translation adjustment				(2)		(2)
Net loss					(2,464)	(2,464)
Balance at end of period at Mar. 31, 2019	$ 16,746		2,326		(18,018)	(15,692)
Balance at end of period (shares) at Mar. 31, 2019	4,801,020	5,166,812
Balance at beginning of period at Dec. 31, 2019		$ 16	49,130	12	(36,866)	12,292
Balance at beginning of period (shares) at Dec. 31, 2019		15,592,718
Increase (Decrease) in Stockholders' Equity
Exercise of stock options			53			$ 53
Exercise of stock options (in shares)		84,589				84,589
Stock–based compensation			159			$ 159
Foreign currency translation adjustment				(34)		(34)
Net loss					(4,730)	(4,730)
Balance at end of period at Mar. 31, 2020		$ 16	$ 49,342	$ (22)	$ (41,596)	$ 7,740
Balance at end of period (shares) at Mar. 31, 2020		15,677,307