Other Accrued Liabilities (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2021	Dec. 31, 2020 USD ($) Assessment	Dec. 31, 2019 USD ($)
Other Accrued Liabilities [Abstract]
Accrued warranty, current, see Note 1		$ 87	$ 170
Accrued compensation, including commissions and vacation		891	1,193
Accrued state sales, use and other taxes		3,105	3,193
Accrued professional fees and other accrued liabilities		607	578
Total other accrued liabilities		4,690	$ 5,134
Income Tax Examination, Penalties and Interest Accrued [Abstract]
Interest amount		$ 171
Subsequent Event [Member]
Income Tax Examination, Penalties and Interest Accrued [Abstract]
Notice period to file an appeal	30 days
Tax Period from March 2014 through February 2020 [Member]
Income Tax Examination, Penalties and Interest Accrued [Abstract]
Number of assessments | Assessment		2
Estimated tax positions subject to audit		$ 1,484
Tax Period from June 2015 through March 2018 [Member]
Income Tax Examination, Penalties and Interest Accrued [Abstract]
Assessment amount		$ 720