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Stockholders' Equity - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended
Oct. 14, 2015
Oct. 14, 2012
Mar. 31, 2016
Mar. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Jun. 30, 2015
Dec. 15, 2015
Apr. 29, 2013
Stockholders Equity Note [Line Items]                  
Common Stock, shares authorized     100,000,000   100,000,000 100,000,000      
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 9.00       $ 1.15        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized         $ 742,648        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition         2 years 8 months 12 days        
Interest Rate of From Notice of Redemption 10.00%                
Error Corrections and Prior Period Adjustments, Description         10.00        
Preferred Stock, Redemption Amount $ 60,000,000                
Noncash Or PartNoncash Valuation of Warrant Liability Issued         $ 2,922,222        
Temporary Equity, Carrying Amount, Attributable to Parent     $ 7,077,778   $ 7,077,778 $ 7,077,778      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate     65.80%   64.40%        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate     1.20%   0.90%        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term     5 years     4 years 3 months 18 days      
Liquidation Damages Percentage         1.50%        
Proceeds from Warrant Exercises         $ 132,002   $ 0    
Southern California Heart Centers, A Medical Corporation [Member]                  
Stockholders Equity Note [Line Items]                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights         9.00        
Proceeds from Issuance of Preferred Stock and Preference Stock         $ 5,000,000        
Series B Preferred Stock [Member]                  
Stockholders Equity Note [Line Items]                  
Restricted shares granted to agent       555,555          
Class of Warrant or Right, Exercise Price of Warrants or Rights       $ 10.00          
Stock Issued During Period, Value, New Issues       $ 4,999,995          
Private Placement                  
Stockholders Equity Note [Line Items]                  
Restricted shares granted to agent 1,111,111                
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 9.00                
Stock Issued During Period, Value, New Issues $ 10,000,000                
Preferred Stock, Liquidation Preference Per Share $ 9.00                
Series B Warrant [Member]                  
Stockholders Equity Note [Line Items]                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate     65.80%            
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate     1.20%            
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term     5 years            
Plan 2015 [Member]                  
Stockholders Equity Note [Line Items]                  
Equity Method Investment, Ownership Percentage               62.00%  
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
2015 Equity Incentive Plan                  
Stockholders Equity Note [Line Items]                  
Equity incentive plan, shares authorized for issuance         1,126,000     1,500,000  
MEZZANINE [Member] | Series A Preferred Stock [Member]                  
Stockholders Equity Note [Line Items]                  
Temporary Equity, Carrying Amount, Attributable to Parent         $ 7,077,778