Restructuring and Exit Activities	6 Months Ended
Jun. 30, 2021
Restructuring and Exit Activities [Abstract]
Restructuring and Exit Activities	Note K: Restructuring and Exit Activities In the third quarter of 2016, in order to streamline our operating and cost structure, we initiated the closure of our wholly-owned subsidiaries, Image Sensing Systems HK Limited (ISS HK) in Hong Kong; Image Sensing Systems (Shenzhen) Limited (ISS WOFE) in China; Image Sensing Systems Europe Limited (ISS Europe) in the United Kingdom; Image Sensing Systems Europe Limited SP.Z.O.O (ISS Poland) in Poland; and Image Sensing Systems Germany, GmbH (ISS Germany) in Germany. At December 31, 2018, Image Sensing Systems Europe Limited and Image Sensing Systems Europe Limited SP.Z.O.O were fully closed. At December 31, 2019, Image Sensing Systems Germany, GmbH was fully closed. During 2020, we initiated the closure of Image Sensing Systems EMEA Limited (ISS UK) and Image Sensing Systems Holdings Limited (ISS Holdings). At June 30, 2021, Image Sensing Systems (Shenzhen) Limited was fully closed. We incurred $23,000 and $32,000 for these entities' closure costs in the six-month periods ended June 30, 2021 and June 30, 2020, respectively.

The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4(e))
-URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-URI http://asc.fasb.org/topic&trid=2175745

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

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