Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Consolidated Statements of Operations and Comprehensive Loss [Abstract]
Net sales	$ 7,441	$ 5,511
Costs and Expenses:
Cost of goods sold	3,384	2,660
Selling, general and administrative	17,417	16,285
Research and development	3,668	4,672
Total costs and expenses	24,469	23,617
Loss from operations	(17,028)	(18,106)
Realized foreign currency translation gain from dissolution of subsidiary	1,202	0
Other income (expense), net	(1)	0
Loss before income taxes	(15,827)	(18,106)
Income tax expense	(9)	(8)
Net loss	$ (15,836)	$ (18,114)
Basic and diluted loss per share (in dollars per share)	$ (10.67)	$ (278.90)
Weighted average shares outstanding - basic and diluted (in shares)	1,649	81
Other comprehensive loss:
Realized foreign currency translation gain from dissolution of subsidiary	$ (1,202)	$ 0
Unrealized foreign currency translation adjustment	(19)	(9)
Total comprehensive loss	$ (17,057)	$ (18,123)