Note 6 - (Loss) Income Per Common Share (Details Textual) - shares	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2021
Incremental Common Shares Attributable to Share-based Payment Arrangements, Total (in shares)	2,499,956	2,496,622
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants (in shares)	1,454,246	1,578,293
Incremental Common Shares Attributable to Dilutive Effect of Deferred Shares (in shares)	1,996,112	2,152,578