Stockholders' Equity - Additional Information (Detail) - Related Party [Domain] - Major Types of Debt and Equity Securities [Domain] - USD ($)	1 Months Ended			3 Months Ended
	Jul. 21, 2014	Mar. 28, 2014	Oct. 18, 2012	Jun. 30, 2015	Mar. 31, 2015	Apr. 29, 2013
Stockholders Equity Note [Line Items]
Equity incentive plan, shares available for future grant				90,000
Common Stock, shares authorized				100,000,000	100,000,000
Exercise price		$ 4.50
Expected term		7 years
Expected volatility rate		71.40%
Risk free interest rate		2.31%
Price Per Share Level For Future Issuance Of Common Shares				$ 9.00
Percentage For Down Round Finance		50.00%
Percentage For Liquidated Damages Equal Of Purchase Price		1.50%
Equity and Debt Financing | NNA of Nevada, Inc
Stockholders Equity Note [Line Items]
Restricted shares granted to agent		200,000
Share price		$ 10.00
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		100,000
Class Of Warrant Or Right Price Per Share		$ 4.50
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 10.00
Equity and debt investment		$ 12,000,000
Note warrant
Stockholders Equity Note [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				300,000
Class of Warrant or Right, Exercise Price of Warrants or Rights				$ 10.00
Placement agent warrants
Stockholders Equity Note [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				200,000
Class of Warrant or Right, Exercise Price of Warrants or Rights				$ 20.00
Maximum | Equity and Debt Financing | NNA of Nevada, Inc
Stockholders Equity Note [Line Items]
Warrants and Rights Outstanding		900,000
Minimum | Equity and Debt Financing | NNA of Nevada, Inc
Stockholders Equity Note [Line Items]
Warrants and Rights Outstanding		$ 868,236
9% Notes Payable
Stockholders Equity Note [Line Items]
Convertible notes, interest rate				9.00%
Southern California Heart Centers [Member]
Stockholders Equity Note [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	100,000
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 10.00
Class of Warrant or Right, Date from which Warrants or Rights Exercisable	Jul. 21, 2018
2010 Equity Incentive Plan
Stockholders Equity Note [Line Items]
Issuance of common stock for services (shares)				1,200,000
2012 Equity Incentive Plan
Stockholders Equity Note [Line Items]
Equity incentive plan, additional shares authorized for issuance			9,000,000
2013 Equity Incentive Plan
Stockholders Equity Note [Line Items]
Equity incentive plan, shares authorized for issuance						500,000
Equity incentive plan, shares available for future grant				48,600