Quarterly report pursuant to Section 13 or 15(d)

Other Assets (Details)

v3.19.2
Other Assets (Details)
$ in Thousands
3 Months Ended
Sep. 19, 2018
USD ($)
Jul. 25, 2018
USD ($)
Jun. 30, 2019
USD ($)
kW
Jun. 30, 2018
USD ($)
Sep. 30, 2013
Other Assets          
Reduction in fixed rate royalty (as a percent)         50.00%
Payment of royalty settlement $ 3,000        
Carrier          
Other Assets          
Unpaid earned royalties     $ 0    
Royalty-related assets     $ 2,864    
Amortization period of prepaid royalty     15 years    
Carrier | Other current assets          
Other Assets          
Royalty-related assets     $ 124    
Carrier | Other assets          
Other Assets          
Royalty-related assets     $ 2,740    
Carrier | C200          
Other Assets          
Capacity of microturbine (in kW) | kW     200    
Payment of royalty settlement   $ 3,000      
Carrier | C200 and C1000          
Other Assets          
Royalties earned     $ 0 $ 300