Note 6 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	2020	2019
Dividend yield	0	0
Expected volatility	40.3%	37.5%
Expected life of option (years)	10	5
Risk-free interest rate	1.4%	1.7%
Fair value of each option on grant date	$2.90	$2.53

Share-based Payment Arrangement, Option, Activity [Table Text Block]

				Weighted
				Average
				Exercise
	Shares			Price
Outstanding at January 1, 2020		19,250		$	11.32
Granted		10,000			5.67
Exercised		—			—
Expired and forfeited		(11,750	)		12.99
Outstanding at December 31, 2020		17,500		$	6.97
Exercisable at December 31, 2020		5,332		$	9.19

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

			Weighted
			Average
	Number of		Grant Date
	Shares		Fair Value
Unvested shares at January 1, 2020		—		—
Granted		54,300	$	6.11
Vested		—		—
Forfeited or surrendered		—		—
Unvested shares at December 31, 2020		54,300		6.11