Note 3 - Significant Accounting Policies (Details Textual) shares in Thousands	12 Months Ended
Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares
Accounts Receivable, Allowance for Credit Loss, Ending Balance	$ 0	$ 0
Impairment of Long-Lived Assets Held-for-use	0	0
Contract with Customer, Asset, after Allowance for Credit Loss, Total	1,800,000
Product Warranty Expense (Benefit)	$ (141,235)	$ 142,000
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period \| shares	0	0
Unrecognized Tax Benefits, Ending Balance	$ 0	$ 0
Unrecognized Tax Benefits, Period Increase (Decrease), Total	$ 0	0
Licensing Agreements [Member]
Finite-Lived Intangible Asset, Useful Life	6 years
Amortization of Intangible Assets, Total	$ 21,000	21,000
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	21,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	$ 10,500
Licensing Agreements [Member] \| General and Administrative Expense [Member]
Finite-Lived Intangible Assets, Change in Contingent Liability		116,000
IDIQ Agreement [Member] \| ADEPT Units [Member]
Units Delivered	226
Minimum [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Maximum [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	5 years
Equipment, Furniture and Fixtures [Member]
Depreciation, Total	$ 98,159	$ 61,252
Equipment, Furniture and Fixtures [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Equipment, Furniture and Fixtures [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life	7 years
Revenue Benchmark [Member]
Concentration Risk, Percentage	98.00%	99.00%

Amount of increase (decrease) in the value of a contingent liability related to an intangible asset.

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The amount of product warranty expense (benefit).

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Number of units delivered.

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Amount of allowance for credit loss on accounts receivable.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Number of shares issued under share-based payment arrangement.

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Amount of unrecognized tax benefits.

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Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns.

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