XML 78 R46.htm IDEA: XBRL DOCUMENT v3.19.3
NATURE OF OPERATIONS - Additional Information (Detail) - USD ($)
Jul. 31, 2019
Apr. 30, 2019
Mar. 01, 2019
Feb. 28, 2019
Jul. 31, 2018
Jun. 30, 2014
Nature Of Operations [Line Items]            
Cash and cash equivalents $ 32,548,000       $ 92,138,000  
Revolving credit facility 6,000,000       0  
Debt instrument stated percentage     5.25%      
Convertible notes payable     $ 65,600,000 $ 65,600,000 64,500,000  
Convertible senior notes 0       50,274,000  
PNC Bank Credit Facility            
Nature Of Operations [Line Items]            
Credit facility, readily available borrowing capacity 13,800,000          
Line of credit facility, maximum credit commitment   $ 25,000,000       $ 50,000,000
Line of Credit | Cerberus Credit Facility            
Nature Of Operations [Line Items]            
Revolving credit facility 6,000,000       $ 0  
Line of credit facility, maximum credit commitment $ 19,000,000          
SPHG Holdings | Convertible Senior Unsecured Note            
Nature Of Operations [Line Items]            
Debt instrument stated percentage 7.50%     7.50%    
Convertible senior notes       $ 14,900,000