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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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DEBT - Additional Information (Detail)					3 Months Ended			9 Months Ended
DEBT - Additional Information (Detail)	Feb. 28, 2019 USD ($) $ / shares	Dec. 15, 2017	Dec. 15, 2017 USD ($)	Jun. 30, 2014 USD ($)	Apr. 30, 2019 USD ($)	Apr. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Apr. 30, 2019 USD ($)	Apr. 30, 2018 USD ($)	Mar. 01, 2019 USD ($)	Jul. 31, 2018 USD ($)	Mar. 18, 2014 USD ($)
Debt Instrument [Line Items]
Debt instrument, carrying amount											$ 64,500,000
Notes payable					$ 0			$ 0		$ 65,600,000	50,274,000
Repayments of convertible debt								63,925,000	$ 0
Debt instrument, interest rate, effective percentage	18.47%
Term loan facility								0	393,000,000
ExcessCashFlowPayments								8,900,000
Revolving credit facility outstanding					10,000,000			10,000,000			0
Redemption price percentage	100.00%
Carrying amount of equity component					8,200,000			$ 8,200,000
Unamortized discount, remaining amortization period								58 months
PNC Bank Credit Facility
Debt Instrument [Line Items]
Line of credit facility, term				5 years
Line of credit facility, maximum credit commitment				$ 50,000,000	25,000,000			$ 25,000,000
Line of credit facility, unutilized commitment fee percentage				0.25%
Available borrowing capacity					12,500,000			12,500,000
Balance outstanding					0			0			0
Cerberus Credit Facility
Debt Instrument [Line Items]
Available borrowing capacity					15,000,000			15,000,000
Balance outstanding					0			0			0
Term loan facility			$ 393,000,000
Revolving credit facility			$ 25,000,000
Line of credit facility, interest rate description		Borrowings under the Cerberus Credit Facility bear interest, at the Borrower's option, at a Reference Rate plus 3.75% or a LIBOR Rate plus 6.5%, each as defined the Financing Agreement.
Aggregate amount of each consecutive quarterly scheduled principal installment							$ 1,500,000
Leverage ratio		3.50%	3.50%
London Interbank Offered Rate (LIBOR) \| Cerberus Credit Facility
Debt Instrument [Line Items]
Debt instrument, percentage points added to the reference rate		6.50%
Base Rate \| Cerberus Credit Facility
Debt Instrument [Line Items]
Debt instrument, percentage points added to the reference rate		3.75%
Letter of Credit Sublimit \| PNC Bank Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum credit commitment					5,000,000			5,000,000
Scenario 1 \| Cerberus Credit Facility
Debt Instrument [Line Items]
Excess cash flow payment percentage			50.00%
Scenario 1 \| London Interbank Offered Rate (LIBOR) \| PNC Bank Credit Facility
Debt Instrument [Line Items]
Debt instrument, percentage points added to the reference rate				2.25%
Scenario 2 \| Cerberus Credit Facility
Debt Instrument [Line Items]
Excess cash flow payment percentage			25.00%
Scenario 2 \| London Interbank Offered Rate (LIBOR) \| PNC Bank Credit Facility
Debt Instrument [Line Items]
Debt instrument, percentage points added to the reference rate				1.00%
Scenario 2 \| Federal Funds Open Rate \| PNC Bank Credit Facility
Debt Instrument [Line Items]
Debt instrument, percentage points added to the reference rate				0.50%
5.25% Convertible Senior Notes Due 2019
Debt Instrument [Line Items]
Principal amount												$ 100,000,000
Debt instrument, stated interest rate												5.25%
Debt instrument, interest expense					$ 754,000	$ 2,126,000		$ 4,916,000	$ 6,257,000
Debt instrument, interest rate, effective percentage					13.90%			13.90%
Term Loan \| Cerberus Credit Facility
Debt Instrument [Line Items]
Long-term debt					$ 375,667,000			$ 375,667,000			388,838,000
Principal amount											390,000,000
Principal amount outstanding					376,625,000			376,625,000			390,000,000
Current and long-term net					375,700,000			375,700,000			$ 388,800,000
Line of Credit \| Cerberus Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum credit commitment					15,000,000			15,000,000
Revolving credit facility outstanding					10,000,000			10,000,000
SPHG Holdings
Debt Instrument [Line Items]
Debt instrument, interest expense					475,000			500,000
Debt conversion ratio	0.4212655
Debt conversion price (in usd per share) \| $ / shares	$ 2.37
SPHG Holdings \| 7.50% Convertible Senior Debt
Debt Instrument [Line Items]
Principal amount	$ 14,900,000				$ 14,940,000			$ 14,940,000
Debt instrument, stated interest rate	7.50%
Notes payable	$ 14,900,000