Note 13 - Significant Customers	12 Months Ended
Dec. 31, 2019
Disclosure Text Block [Abstract]
Note 13 - Significant Customers	Note 13 - Significant Customers As of December 31, 2019, Customer A represented 32% and Customer B represented 10% of accounts receivable, and Customer C represented 16%, Customer D 17%, Customer E 13%, and Customer F 11% of contract revenue in excess of billings. As of December 31, 2018, Customer G represented 24% of accounts receivable, and Customer H represented 10% of contract revenue in excess of billings. For the years ended December 31, 2019 and 2018, no customers represented 10% or more of total sales.

The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-URI http://asc.fasb.org/topic&trid=2134479

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