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Commitments and Contingencies - Related Party Transactions (Details)
1 Months Ended 12 Months Ended
Jan. 23, 2017
USD ($)
ft²
Apr. 01, 2014
Feb. 28, 2014
USD ($)
ft²
May 31, 2007
USD ($)
ft²
May 31, 2006
USD ($)
Mar. 31, 2017
USD ($)
subsidiary
Mar. 31, 2016
USD ($)
Mar. 31, 2015
USD ($)
Jul. 23, 2013
USD ($)
Operating Leases                  
Area of office space | ft² 5,980     52,000          
Term of lease 60 months 96 months   88 months          
Monthly lease rate during first year of lease $ 14,000   $ 76,000 $ 102,000          
Maximum monthly lease rate during last year of lease 16,000       $ 120,000 $ 90,000      
Reduced office space due to amendment of the lease agreement | ft²     11,000            
Tenant improvement allowance $ 119,000         328,000      
Future minimum rental payments under non-cancelable operating leases                  
2018           1,906,000      
2019           2,100,000      
2020           1,872,000      
2021           1,813,000      
2022           1,725,000      
Thereafter           288,000      
Total           9,704,000      
Total rental expense           $ 1,700,000 $ 1,700,000 $ 1,700,000  
Maxxess                  
Related Party Transactions                  
Number of former subsidiaries | subsidiary           1      
Promissory note payable issued to reporting entity for amounts previously owed under a sublease agreement           $ 146,000     $ 274,000
Interest on promissory note (as a percent)           6.00%      
Maxxess | Maximum                  
Related Party Transactions                  
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners           2.00%