Business Description and Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) segment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Ownership percentage in subsidiary	100.00%
Number of operating segments | segment	2
Total cash and restricted cash	$ 9,000,000	$ 5,277,000	$ 4,602,000
Cash	8,939,000	5,058,000
Current portion of restricted cash	61,000	158,000
Long-term restricted cash	0	61,000
Allowance for doubtful accounts	100,000	182,000
Decrease in operating expense	874,000
Current portion deferred revenue	783,000	1,217,000
Impairment charges - property and equipment	98,000	144,000
Disposal of fixed assets	1,092,000	3,438,000
Accumulated depreciation of fixed assets disposed	993,000	3,287,000
Proceeds from sale of fixed assets	1,000	7,000
Loss on disposal	98,000	144,000
Impairment charges - goodwill	0	541,000
Impairment charges - intangible assets	207,000	0
Service
Property, Plant and Equipment [Line Items]
Performance obligation	8,000
Current portion deferred revenue	24,000	21,000	$ 21,000
Product
Property, Plant and Equipment [Line Items]
Performance obligation	1,156,000
Current portion deferred revenue	1,193,000	978,000
Revenue
Property, Plant and Equipment [Line Items]
Excise and sales taxes	264,000	313,000
Cost of Sales
Property, Plant and Equipment [Line Items]
Excise and sales taxes	$ 271,000	$ 328,000
Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Term of contract	1 year
Renewal term	12 months
Useful lives	three
Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	10 years
Term of contract	3 years
Renewal term	5 years
Useful lives		ten years