Quarterly report pursuant to Section 13 or 15(d)

Capital Stock Transactions - Additional Information (Details)

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Capital Stock Transactions - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Sep. 30, 2017
Aug. 31, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Mar. 31, 2017
Class Of Stock [Line Items]              
Series A convertible preferred stock authorized (in shares) 2,000,000   2,000,000   2,000,000   2,000,000
Series A convertible preferred stock, par value (in dollars per share) $ 0.0001   $ 0.0001   $ 0.0001   $ 0.0001
Series A convertible preferred stock issued (in shares) 100,000   100,000   100,000   100,000
Extinguishment of debt $ 6,000   $ 6,000        
Shares issued upon extinguishment 5,043,018            
Total unrecognized stock base compensation expense $ 3,254,000   3,254,000 $ 6,731,000 $ 3,254,000 $ 6,731,000  
Unvested stock options, weighted average period         2 years 7 days 2 years 3 months 21 days  
Restricted Stock              
Class Of Stock [Line Items]              
Granted (shares)         265,138    
Time Condition RSAs              
Class Of Stock [Line Items]              
Compensation expense     74,000 $ 86,000 $ 0 $ 0  
Non Vested Restricted Stock              
Class Of Stock [Line Items]              
Vesting period   1 year          
Granted (shares)         265,138    
Fair value of shares on date of issuance   $ 289,000          
Total unrecognized stock base compensation expense $ 241,000   $ 241,000   $ 241,000    
Unvested stock options, weighted average period         10 months    
Minimum | Restricted Stock              
Class Of Stock [Line Items]              
Vesting period         3 months    
Maximum | Restricted Stock              
Class Of Stock [Line Items]              
Vesting period         2 years    
Convertible Preferred Stock              
Class Of Stock [Line Items]              
Series A convertible preferred stock authorized (in shares)             2,000,000
Series A convertible preferred stock, par value (in dollars per share)             $ 0.0001
Series A convertible preferred stock issued (in shares)             100,000
Aggregate shares upon conversion (shares)         20,000    
Liquidation preference (in dollars per share)             $ 10