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Note 9 - Employee 401(k) Plan	12 Months Ended
	Dec. 31, 2019
Notes to Financial Statements
Pension and Other Postretirement Benefits Disclosure [Text Block]	Note  9  — Employee 401 (k) Plan In January 1991, the Company adopted an employee retirement plan ( “401 (k) Plan”) under Section  401 (k) of the Internal Revenue Code covering all employees. Employee contributions may be made to the 401 (k) Plan up to limits established by the Internal Revenue Service. Company matching contributions may be made at the discretion of the Board of Directors. The Company made matching contributions of $926, $724 and $664, in 2019, 2018 and 2017, respectively.

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- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

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