Note 3 - Significant Accounting Policies (Details Textual)	3 Months Ended
Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)
Contract with Customer, Asset, after Allowance for Credit Loss, Total	$ 2,700,000
Product Warranty Expense (Benefit)	$ 0	$ 0
Restricted Stock [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Licensing Agreements [Member]
Finite-Lived Intangible Asset, Useful Life	6 years
Amortization of Intangible Assets, Total	$ 5,250	$ 5,250
IDIQ Agreement [Member] \| ADEPT Units [Member]
Units Delivered	226
Units to be Delivered	37

The amount of product warranty expense (benefit).

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- Definition

Number of units delivered.

+ References

No definition available.

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Number of units to be delivered.

+ References

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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.

+ References

No definition available.

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- Definition

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.

+ References

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-SubTopic 10
-Section 50
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