Annual report pursuant to Section 13 and 15(d)

Capital Stock Transactions - Warrants (Details)

v3.8.0.1
Capital Stock Transactions - Warrants (Details) - Warrant liability
 12 Months Ended
Mar. 31, 2018
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]  
Outstanding (in shares) | shares 5,003,813
Issued (in shares) | shares 25,000
Exercised (in shares) | shares (286,600)
Canceled/Expired (in shares) | shares (205,356)
Outstanding (in shares) | shares 4,536,857
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Weighted Average Exercise Price [Roll Forward]  
Outstanding (in dollars per share) | $ / shares $ 1.62
Issued (in dollars per share) | $ / shares 2.04
Exercised (in dollars per share) | $ / shares 1.33
Canceled/Expired (in dollars per share) | $ / shares 3.50
Outstanding (in dollars per share) | $ / shares $ 1.56