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Stockholders' Equity - Restricted Stock Awards and Restricted Stock Units - Additional Information (Detail) - shares | 12 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2015 | Dec. 31, 2012
Class Of Stock [Line Items] |  |  |  |
Restricted stock awards issued to member of senior management | 200,000 |  |  |
Restricted stock units (RSUs) [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Restricted stock awards vested during the period | 106,650 | 250,000 | 255,000 |
Restricted stock surrendered |  | 129,900 | 137,816 |
Restricted stock awards granted | 1,309,656 |  |  |
Percentage of vesting schedule |  |  |  | 25.00%
Period for vesting schedule over start date |  |  |  | 4 years
Stock option granted with immediate vesting |  | 129,900 | 137,816 |
Granted, Number of Shares | 1,309,656 |  |  |
Restricted stock [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Restricted stock awards vested during the period | 6,250 |  |  |
Restricted stock awards granted | 0 |  |  |
Common stock returned by holders |  | 2,500 |  |
Granted, Number of Shares | 0 |  |  |
Stock options [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Restricted stock awards granted | 1,309,656 |  |  |
Period for vesting schedule over start date | 4 years |  |  |
Granted, Number of Shares | 1,309,656 |  |  |
Awards granted remainder vesting period ratably on a quarterly basis | 36 months |  |  |
Award vesting percentage on the two-year anniversary | 50.00% |  |  |
Award vesting percentage on the three-year anniversary | 50.00% |  |  |
Stock options [Member] | 2012 Plan [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Award vesting conditions | stock options generally vest on (i) the one year anniversary of the grant date, (ii) quarterly over a three year period, or (iii) over a four-year period with a quarter vesting on either the one year anniversary of employment or the one year anniversary of the vesting commencement date |  |  |
Stock options [Member] | Yearly Vesting [Member] | 2012 Plan [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Award vesting conditions | 0 |  |  |
Award vesting percentage | 25.00% |  |  |
Senior Management [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Restricted stock awards vested during the period | 150,000 |  |  |
Restricted stock surrendered | 50,000 |  |  |
Senior Management [Member] | Restricted stock units (RSUs) [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Restricted stock awards granted |  |  |  | 950,000
Granted, Number of Shares |  |  |  | 950,000
Non-Executive Employees [Member] | Restricted stock units (RSUs) [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Restricted stock awards granted |  |  |  | 130,000
Granted, Number of Shares |  |  |  | 130,000
Consultants [Member] | Restricted stock units (RSUs) [Member] |  |  |  |
Class Of Stock [Line Items] |  |  |  |
Restricted stock awards granted |  |  |  | 100,000
Percentage of vesting schedule |  |  |  | 100.00%
Period for vesting schedule over start date |  |  |  | 6 months
Granted, Number of Shares |  |  |  | 100,000

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- Definition Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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