Debt and Other Financing - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands		3 Months Ended		6 Months Ended
	Apr. 20, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2016
Line Of Credit Facility [Line Items]
Repayments of debt				$ 13,920,000	$ 1,644,000
Loss on extinguishment of debt		$ 1,525,000	$ 0	1,525,000	0
Term of warrant (in years)	5 years
Remaining authorized repurchase amount		15,300,000		15,300,000
Warrant, fair value disclosure		2,100,000		2,100,000
Debt discount		640,000		640,000
Proceeds from issuance of warrants	$ 1,500,000			1,500,000	$ 0
Number of securities called by warrants (in shares)	1,500
Exercise price of warrants (in dollars per share)	$ 5.00
Treasury stock acquired (in shares)	419
Cost per share (in dollars per share)	$ 3.60
Value of treasury stock acquired	$ 1,500,000
New Credit Agreement
Line Of Credit Facility [Line Items]
Credit agreement, minimum borrowed interest rate	9.486%
Debt Instrument, periodic payment, principal	$ 1,300,000
Percentage of minimum cash required on total outstanding amount	20.00%
Non-recurring charges incurred in wind-down (up to)	$ 4,300,000
Debt instrument, face amount	$ 20,000,000.0
Prepayment of principal amount, percent	25.00%
Long-term debt outstanding		20,000,000		20,000,000
Unamortized debt issuance costs		871,000		871,000
Short-term debt classified, net		0		0
New Credit Agreement | Current Quarter
Line Of Credit Facility [Line Items]
Minimum consolidated EBITDA required	$ 2,000,000.0
New Credit Agreement | Immediately Preceding Quarter
Line Of Credit Facility [Line Items]
Minimum consolidated EBITDA required	2,000,000.0
New Credit Agreement | Prior Quarter
Line Of Credit Facility [Line Items]
Minimum consolidated EBITDA required	2,000,000.0
New Credit Agreement | Subsequent Quarter
Line Of Credit Facility [Line Items]
Minimum consolidated EBITDA required	$ 2,000,000.0
New Credit Agreement | LIBOR
Line Of Credit Facility [Line Items]
Credit agreement, basis spread on variable interest rate	7.75%
Credit Agreement
Line Of Credit Facility [Line Items]
Repayments of debt	$ 13,900,000
Prior Credit Agreement
Line Of Credit Facility [Line Items]
Debt instrument, face amount						$ 20,000,000.0
Fee amount	487,000
Long-term debt outstanding	$ 13,400,000
Loss on extinguishment of debt		$ 1,500,000		$ 1,500,000