Annual report pursuant to Section 13 and 15(d)

Note 13 - Capital and Other Components of Equity - Warrant Exercises (Details)

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Note 13 - Capital and Other Components of Equity - Warrant Exercises (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Number exercised (in shares)     6,926,061
Proceeds $ 7,706 $ 796 $ 7,706
Over-Allotment Option Warrants Issued in May 2018 [Member]      
Number exercised (in shares)     3,594,350
Proceeds     $ 3,567
Warrants Issued December 27, 2017 [Member]      
Number exercised (in shares)     2,676,611
Proceeds     $ 3,373
Warrants Issued in Connection with Public Offering February 2017 [Member]      
Number exercised (in shares)     180,100
Proceeds     $ 292
Broker Warrants Issued May 2018 [Member]      
Number exercised (in shares)     325,000
Proceeds     $ 257
Warrants Issued in Connection with Private Placement [Member]      
Number exercised (in shares)     150,000
Proceeds     $ 217