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Note 3 - Revenue (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | Year Ending December 31, 2020 |
|  | Over time |  |  | Point in time |  |  | Total |
Aerospace |  | $ | 1,607 |  |  | $ | 6,013 |  |  | $ | 7,620 |
Industrial |  | $ | 1,849 |  |  | $ | 3,565 |  |  | $ | 5,414 |
Research |  | $ | 3,208 |  |  | $ | 678 |  |  | $ | 3,886 |
Total |  | $ | 6,664 |  |  | $ | 10,256 |  |  | $ | 16,920 |
|  | Year ending December 31, 2019 |
|  | Over time |  |  | Point in time |  |  | Total |
Aerospace |  | $ | 3,224 |  |  | $ | 5,948 |  |  | $ | 9,172 |
Industrial |  | $ | 3,199 |  |  | $ | 3,994 |  |  | $ | 7,193 |
Research |  | $ | 2,609 |  |  | $ | 673 |  |  | $ | 3,282 |
Total |  | $ | 9,032 |  |  | $ | 10,615 |  |  | $ | 19,647 |
Schedule Of Cost And Estimated Earnings In Excess Of Billings [Table Text Block] |
|  | 2020 |  |  | 2019 |
Costs incurred on contracts in progress |  | $ | 4,464,471 |  |  | $ | 6,943,066 |
Estimated earnings |  |  | 2,087,396 |  |  |  | 3,370,032 |
|  |  | 6,551,867 |  |  |  | 10,313,098 |
Billings to date |  |  | (6,212,229 | ) |  |  | (10,645,800 | )
|  | $ | 339,638 |  |  | $ | (332,702 | )
Deferred revenue related to non-systems contracts |  |  | (632,014 | ) |  |  | (1,429,582 | )
|  |  | (292,376 | ) |  | $ | (1,762,284 | )
Included in accompanying balance sheets |  |  |  |  |  |  |  |
Under the following captions: |  |  |  |  |  |  |  |
Contract assets |  | $ | 494,281 |  |  | $ | 512,952 |
Contract liabilities |  | $ | (786,657 | ) |  | $ | (2,275,236 | )

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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