Annual report pursuant to Section 13 and 15(d)

Other Assets - General Information (Details)

v3.20.1
Other Assets - General Information (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 19, 2018
USD ($)
Sep. 30, 2013
Mar. 31, 2020
USD ($)
kW
Mar. 31, 2019
USD ($)
Jul. 25, 2018
USD ($)
Other Assets          
Prepaid royalty     $ 2,796 $ 2,892  
Carrier          
Other Assets          
Reduction in fixed rate royalty (as a percent)   50.00%      
Payment of royalty settlement $ 3,000        
Prepaid royalty $ 3,000        
Amortization period of prepaid royalty     15 years    
Carrier | C200          
Other Assets          
Capacity of microturbine (in kW) | kW     200    
Accrued royalties         $ 3,000
Carrier | C200 and C1000          
Other Assets          
Royalties earned     $ 0 $ 400  
Accrued royalties     $ 0