Quarterly report pursuant to Section 13 or 15(d)

Notes Payable to Former Stockholders - Additional Information (Detail)

v3.8.0.1
Notes Payable to Former Stockholders - Additional Information (Detail)
3 Months Ended
Mar. 31, 2018
Restricted Stock - Notes Payable [Member]  
Debt Instrument [Line Items]  
Unsecured notes interest rate 5.00%
Unsecured notes maturity date Jun. 30, 2020
SARs - Notes Payable [Member]  
Debt Instrument [Line Items]  
Unsecured notes interest rate 5.00%
Unsecured notes maturity date Jun. 30, 2020