Consolidated Statements of Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenues, net	$ 24,420	$ 29,983
Cost of revenues	12,885	17,946
Gross profit	11,535	12,037
Operating expenses:
Sales and marketing	5,482	6,958
Research and development	10,788	12,815
General and administrative	9,327	8,559
Total operating expenses	25,597	28,332
Loss from operations	(14,062)	(16,295)
Other income, net	984	1,533
Loss before benefit from income taxes	(13,078)	(14,762)
Income tax benefit, net	(134)	(711)
Net loss	(12,944)	(14,051)
Foreign currency translation adjustments	53	1
Comprehensive loss	$ (12,891)	$ (14,050)
Net loss per share available to common stockholders, basic and diluted	$ (1.01)	$ (1.91)
Weighted-average shares used to compute net loss per share available to common stockholders, basic and diluted	12,846	7,344
Amortization of intangible assets is allocated as follows:
Amortization of intangible assets	$ 0	$ 95
Restructuring related expenses are allocated as follows (Note 4):
Restructuring related expenses	181	1,176
Cost of Revenues [Member]
Stock-based compensation is allocated as follows (Note 10):
Stock-based compensation expense	291	251
Amortization of intangible assets is allocated as follows:
Amortization of intangible assets		47
Restructuring related expenses are allocated as follows (Note 4):
Restructuring related expenses	43	529
Sales and Marketing [Member]
Stock-based compensation is allocated as follows (Note 10):
Stock-based compensation expense	408	353
Amortization of intangible assets is allocated as follows:
Amortization of intangible assets
Restructuring related expenses are allocated as follows (Note 4):
Restructuring related expenses	134	304
Research and Development [Member]
Stock-based compensation is allocated as follows (Note 10):
Stock-based compensation expense	594	607
Amortization of intangible assets is allocated as follows:
Amortization of intangible assets		48
Restructuring related expenses are allocated as follows (Note 4):
Restructuring related expenses	2	215
General and Administrative [Member]
Stock-based compensation is allocated as follows (Note 10):
Stock-based compensation expense	728	283
Amortization of intangible assets is allocated as follows:
Amortization of intangible assets
Restructuring related expenses are allocated as follows (Note 4):
Restructuring related expenses	$ 2	$ 128