Note 3 - Acquisitions (Details Textual) $ in Millions							2 Months Ended	3 Months Ended																	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 21, 2021 USD ($)	Dec. 21, 2021 CAD ($)	Oct. 28, 2021 USD ($)	Oct. 21, 2021	Oct. 06, 2021 USD ($) shares	Dec. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)		Sep. 30, 2021 USD ($)	[2]	Jun. 30, 2021 USD ($)	[3]	Mar. 31, 2021 USD ($)	[4]	Dec. 31, 2020 USD ($)	[5]	Sep. 30, 2020 USD ($)	[6]	Jun. 30, 2020 USD ($)	[7]	Mar. 31, 2020 USD ($)	[8]	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 21, 2021 CAD ($)
Revenue from Contract with Customer, Including Assessed Tax									$ 22,358,000	[1]	$ 21,144,000		$ 21,820,000		$ 19,556,000		$ 14,875,000		$ 14,443,000		$ 13,275,000		$ 11,230,000		$ 84,878,000	$ 53,823,000
Net Income (Loss) Attributable to Parent, Total									287,000	[1]	$ 2,175,000		$ 2,609,000		$ 2,212,000		$ (380,000)		$ 458,000		$ 170,000		$ (1,143,000)		7,283,000	$ (895,000)
Z-Sciences [Member]
Business Combination, Consideration Transferred, Total						$ 479,000
Payments to Acquire Businesses, Gross						300,000
Business Combination, Contingent Consideration, Liability, Total	$ 179,000					179,000	$ 179,000	$ 179,000	179,000																179,000
Business Combination, Acquisition Related Costs						$ 82,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year)						14 years
Revenue from Contract with Customer, Including Assessed Tax								15,000
Z-Sciences [Member] | Restricted Stock Award [Member] | Achieving Future Performance Milestones [Member]
Business Acquisition, Equity Interest Issued or Issuable, Vesting Percentage						100.00%
Z-Sciences [Member] | Maximum [Member] | Restricted Stock Award [Member] | Achieving Future Performance Milestones [Member]
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable						$ 1,800,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares						200,000
Videology [Member]
Business Combination, Consideration Transferred, Total				$ 12,094
Payments to Acquire Businesses, Gross				12,000,000
Business Combination, Acquisition Related Costs				$ 288,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year)				11 years 7 months 6 days
Revenue from Contract with Customer, Including Assessed Tax							1,434,000
Net Income (Loss) Attributable to Parent, Total							(146,000)
Business Acquisition, Transaction Costs				$ 288,000
Acculogic [Member]
Business Combination, Consideration Transferred, Total		$ 9,297,000
Payments to Acquire Businesses, Gross		9,000,000
Business Combination, Contingent Consideration, Liability, Total	930,000	930,000					930,000	930,000	930,000																930,000
Business Combination, Acquisition Related Costs		1,297,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life (Year)					14 years
Revenue from Contract with Customer, Including Assessed Tax	48,000
Net Income (Loss) Attributable to Parent, Total	(131,000)
Business Acquisition, Transaction Costs		$ 1,297,000
Acculogic [Member] | Payments Based on Performance Metrics [Member]
Business Combination, Contingent Consideration, Liability, Total	$ 4,000,000						$ 4,000,000	$ 4,000,000	$ 4,000,000																$ 4,000,000		$ 5.0
Minimum Amount Required for Invoices Received			$ 2.5

[1] The quarter ended December 31, 2021 includes a recovery of $17 of restructuring and other charges which are discussed in Note 5.

[2] The quarter ended September 30, 2021 includes $51 of restructuring and other charges which are discussed in Note 5.

[3] The quarter ended June 30, 2021 includes $197 of restructuring and other charges which are discussed in Note 5.

[4] The quarter ended March 31, 2021 includes $55 of restructuring and other charges which are discussed in Note 5.

[5] The quarter ended December 31, 2020 includes $1,078 of restructuring and other charges which are discussed in Note 5.

[6] The quarter ended September 30, 2020 includes $161 of restructuring and other charges which are discussed in Note 5.

[7] The quarter ended June 30, 2020 includes $38 of restructuring and other charges which are discussed in Note 5.

[8] The quarter ended March 31, 2020 includes $8 of restructuring and other charges which are discussed in Note 5.