Note 6 - Stockholders' Equity (Details Textual) - $ / shares		3 Months Ended		6 Months Ended
	Jun. 19, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Incremental Common Shares Attributable to Share-based Payment Arrangements, Total (in shares)		0	0	0	417,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)					417,000
Rights Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)	19,500,000
Shares Issued, Price Per Share (in dollars per share)	$ 0.65
Restricted Stock [Member]
Stock Repurchased During Period, Shares (in shares)		0	0	0	0