Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Consolidated Statements of Operations and Comprehensive Loss [Abstract]
Net sales	$ 5,511	$ 4,998
Costs and Expenses:
Cost of goods sold	2,660	3,670
Selling, general and administrative	16,285	15,311
Research and development	4,672	3,053
Total costs and expenses	23,617	22,034
Loss from operations	(18,106)	(17,036)
Other income, net	0	10
Loss before income taxes	(18,106)	(17,026)
Income tax expense	(8)	(6)
Net loss	$ (18,114)	$ (17,032)
Basic and diluted loss per share (in dollars per share)	$ (9.30)	$ (42.14)
Weighted average shares outstanding - basic and diluted (in shares)	2,433	404
Other comprehensive loss:
Foreign currency translation adjustment	$ (9)	$ (4)
Total comprehensive loss	$ (18,123)	$ (17,036)