Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid in Capital [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2019	$ 0	$ 218,278	$ 1,214	$ (217,502)	$ 1,990
Balance (in shares) at Dec. 31, 2019	155,802
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 0	0	0	(4,568)	(4,568)
Foreign currency translation adjustments	0	0	(3)	0	(3)
Stock-based compensation, net	$ 0	380	0	0	380
Stock-based compensation, net (in shares)	0
Issuance of common and preferred stock, net	$ 0	9,616	0	0	9,616
Issuance of common and preferred stock, net (in shares)	340,261
Exercise of warrants	$ 0	289	0	0	289
Exercise of warrants (in shares)	29,933
Conversion of preferred stock into common stock	$ 0	0	0	0	0
Conversion of preferred stock into common stock (in shares)	378,751
Balance at Mar. 31, 2020	$ 0	228,563	1,211	(222,070)	7,704
Balance (in shares) at Mar. 31, 2020	904,747
Balance at Dec. 31, 2019	$ 0	218,278	1,214	(217,502)	1,990
Balance (in shares) at Dec. 31, 2019	155,802
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss					(8,490)
Foreign currency translation adjustments					(5)
Balance at Jun. 30, 2020	$ 0	234,385	1,209	(225,992)	9,602
Balance (in shares) at Jun. 30, 2020	1,439,894
Balance at Dec. 31, 2019	$ 0	218,278	1,214	(217,502)	1,990
Balance (in shares) at Dec. 31, 2019	155,802
Balance at Dec. 31, 2020	$ 0	249,663	(7)	(233,338)	16,318
Balance (in shares) at Dec. 31, 2020	2,736,060
Balance at Mar. 31, 2020	$ 0	228,563	1,211	(222,070)	7,704
Balance (in shares) at Mar. 31, 2020	904,747
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 0	0	0	(3,922)	(3,922)
Foreign currency translation adjustments	0	0	(2)	0	(2)
Stock-based compensation, net	$ 0	347	0	0	347
Stock-based compensation, net (in shares)	0
Issuance of common and preferred stock, net	$ 0	3,424	0	0	3,424
Issuance of common and preferred stock, net (in shares)	290,938
Exercise of warrants	$ 0	2,051	0	0	2,051
Exercise of warrants (in shares)	227,939
Conversion of preferred stock into common stock	$ 0	0	0	0	0
Conversion of preferred stock into common stock (in shares)	16,270
Balance at Jun. 30, 2020	$ 0	234,385	1,209	(225,992)	9,602
Balance (in shares) at Jun. 30, 2020	1,439,894
Balance at Dec. 31, 2020	$ 0	249,663	(7)	(233,338)	16,318
Balance (in shares) at Dec. 31, 2020	2,736,060
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 0	0	0	(5,221)	(5,221)
Foreign currency translation adjustments	0	0	(3)	0	(3)
Stock-based compensation, net	$ 0	355	0	0	355
Stock-based compensation, net (in shares)	0
Issuance of common and preferred stock, net	$ 0	18,902	0	0	18,902
Issuance of common and preferred stock, net (in shares)	3,795,816
Exercise of warrants	$ 0	1	0	0	1
Exercise of warrants (in shares)	66
Balance at Mar. 31, 2021	$ 0	268,921	(10)	(238,559)	30,352
Balance (in shares) at Mar. 31, 2021	6,531,942
Balance at Dec. 31, 2020	$ 0	249,663	(7)	(233,338)	16,318
Balance (in shares) at Dec. 31, 2020	2,736,060
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss					(9,952)
Foreign currency translation adjustments					(3)
Balance at Jun. 30, 2021	$ 0	269,296	(10)	(243,290)	25,996
Balance (in shares) at Jun. 30, 2021	6,532,018
Balance at Mar. 31, 2021	$ 0	268,921	(10)	(238,559)	30,352
Balance (in shares) at Mar. 31, 2021	6,531,942
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 0	0	0	(4,731)	(4,731)
Foreign currency translation adjustments	0	0	0	0	0
Stock-based compensation, net	$ 0	381	0	0	381
Stock-based compensation, net (in shares)	0
Issuance costs related to common stock offerings	$ 0	(6)	0	0	(6)
Exercise of warrants	$ 0	0	0	0	0
Exercise of warrants (in shares)	76
Balance at Jun. 30, 2021	$ 0	$ 269,296	$ (10)	$ (243,290)	$ 25,996
Balance (in shares) at Jun. 30, 2021	6,532,018