XML 51 R40.htm IDEA: XBRL DOCUMENT v3.20.2
Note 3 - Fair Value Measurements - Fair Value and Carrying Value of the Notes (Details) - Senior Notes [Member] - USD ($)
$ in Thousands
Sep. 30, 2020
Mar. 31, 2020
Reported Value Measurement [Member]    
Notes $ 142,945 $ 140,278
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Notes $ 191,475 $ 173,363