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Stockholders' Equity - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
Jul. 16, 2015
Jan. 31, 2016
Jun. 30, 2016
Jun. 30, 2015
Class Of Stock [Line Items]        
Preferred stock, shares authorized     5,000,000 5,000,000
Preferred stock, par value, per share     $ 0.001 $ 0.001
Common stock, shares authorized     100,000,000 100,000,000
Common stock, par value, per share     $ 0.001 $ 0.001
Preferred stock, shares issued     839,200 839,200
Cash dividend paid to holders     $ 2,046,000 $ 2,046,000
Proceeds from common stock, net of offering costs     $ 0 $ 109,000
Common Stock        
Class Of Stock [Line Items]        
Issuance of common stock, shares     6,133,334  
Stock repurchase program commencement date   Jan. 07, 2016    
Shares authorized to repurchase under the stock repurchase program   5,000,000    
Stock repurchase program expiration date   Dec. 31, 2016    
Common Stock | Overallotment Option        
Class Of Stock [Line Items]        
Public offering date     Jul. 16, 2015  
Issuance of common stock, shares 6,133,334      
Proceeds from common stock, net of offering costs $ 38,430,000      
Common stock, underwriting discount 2,484,000      
Common stock, offering costs $ 486,000      
Series A Preferred Stock        
Class Of Stock [Line Items]        
Preferred stock, shares issued     839,200  
Preferred stock, dividend rate percentage     9.75%  
Redeemable preferred stock value per share     $ 25.00  
Preferred stock, redemption terms     Commencing on December 20, 2018, the Company may redeem, at its option, the Series A Preferred Shares, in whole or in part, at a cash redemption price of $25.00 per share plus accrued and unpaid dividends (whether or not declared). Among other things, the Series A Preferred Shares have no stated maturity, are not subject to any sinking fund or other mandatory redemption, and are not convertible into or exchangeable for any of the Company’s other securities.  
Cash dividend per share to holders     $ 2.4375  
Cash dividend paid to holders     $ 2,046  
Series A Preferred Stock | Payment of dividend        
Class Of Stock [Line Items]        
Preferred stock, dividend payment terms     Dividends on the Series A Preferred Shares are cumulative from the date of original issue and are payable on January 31, April 30, July 31 and October 31, as and if declared by the Company’s Board of Directors. If the Company does not pay dividends in full on any two payment dates (whether consecutive or not), the per annum dividend rate will increase an additional 2.0% per annum per $25.00 stated liquidation preference, up to a maximum of 19.0% per annum.  
Series A Preferred Stock | Payment of dividend | Minimum        
Class Of Stock [Line Items]        
Preferred stock, dividend rate percentage     2.00%  
Series A Preferred Stock | Payment of dividend | Maximum        
Class Of Stock [Line Items]        
Preferred stock, dividend rate percentage     19.00%  
Series A Preferred Stock | NYSE MKT listing        
Class Of Stock [Line Items]        
Preferred stock, dividend rate percentage     2.00%  
Preferred stock, dividend payment terms     If the Company fails to maintain the listing of the Series A Preferred Shares on the NYSE MKT or other exchange for 30 days or more, the per annum dividend rate will increase by an additional 2.0% per annum so long as the listing failure continues.  
Series A Preferred Stock | Fixed Charge Coverage Ratio        
Class Of Stock [Line Items]        
Preferred stock, dividend payment terms     The Series A Preferred Shares require the Company to maintain a Fixed Charge Coverage Ratio of at least 2.0. If the Company is not in compliance with this ratio, then it cannot pay any dividend on its common stock.  
Series A Preferred Stock | Fixed Charge Coverage Ratio | Minimum        
Class Of Stock [Line Items]        
Preferred stock, fixed charge coverage ratio     200.00%