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Notes Payable - Additional Information (Detail) - HD Special-Situations III, L.P. - USD ($)
 3 Months Ended
Mar. 23, 2017
Mar. 31, 2017
Senior Secured Term Note    
Debt Instrument [Line Items]    
Debt principal amount $ 7,000,000  
Debt principal periodic payment amount $ 500,000  
Debt instrument, initial repayment date Jun. 30, 2017  
Debt instrument, payment terms   $7.00 million principal amount Senior Secured Term Note (the “Note”) with principal of $0.50 million repayable by June 30, 2017 with the balance due 48 months after issuance for cash at par pursuant to a Note Purchase Agreement dated March 23, 2017 (the “Purchase Agreement”).
Interest rate 11.50%  
Debt instrument, description incase of prepayment principal   The Note is subject to an interest “make-whole” provision such that any prepayment of the principal thereunder in excess of $1.50 million (the “Prepayment Threshold”) within one year of the date of issuance (the “Make-Whole Period”) shall be subject to the payment of a prepayment premium, on the date of such prepayment, in an amount based on an interest rate of 11.5% per annum of the prepayment amount in excess of the Prepayment Threshold for the portion of the Make-Whole Period that will remain after the date that the prepayment is made.
Debt instrument, prepayment of principal after Make Whole Period   After the one year Make- Whole Period the Note may be prepaid in part or in full with no penalty.
Senior Secured Term Note | Minimum    
Debt Instrument [Line Items]    
Prepayment Threshold $ 1,500,000  
Senior Secured Term Note | Purchase Agreement    
Debt Instrument [Line Items]    
Debt, remaining principal payable period   48 months
Debt instrument offering date to purchaser Mar. 23, 2017  
Additional interest rate in case of default   4.00%
Revolving Credit Facility    
Debt Instrument [Line Items]    
Repayments of lines of credit $ 1,000,000