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Deferred tax assets (liabilities) (Detail) - USD ($)
Mar. 31, 2015
Mar. 31, 2014
Jan. 31, 2014
Current deferred tax assets:      
State taxes - current $ 17,062 $ 589 $ 3,808
Stock options 2,177,276 1,675,822 1,649,986
Accrued payroll and related costs 1,529 1,529 1,529
Accrued hospital pool deficit 0 28,649 28,649
Other 65,920 0 0
Net current deferred tax assets before valuation allowance 2,261,787 1,706,589 1,683,972
Valuation Allowance (2,234,631) (1,706,589) (1,683,972)
Net current deferred tax assets 27,156 0 0
Noncurrent Deferred Tax Assets And Liabilities Abstract [Abstract]      
Net operating loss carryforward 2,208,522 2,248,422 1,990,962
Property and equipment (3,170) 0 0
Acquired intangible assets (194,883) (4,954) 0
Other 3,558 8,228 488,704
Net noncurrent deferred tax liabilities before valuation allowance 2,014,027 2,251,696 2,479,666
Valuation Allowance (2,212,398) (2,256,650) (2,479,666)
Net noncurrent deferred tax liabilities (198,371) (4,954) 0
Net deferred tax liabilities $ 171,215 $ 4,954 $ 0