Annual report pursuant to Section 13 and 15(d)

Intangible Assets - Additional Information (Detail)

v3.8.0.1
Intangible Assets - Additional Information (Detail) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]                      
Other direct cost of revenues $ 453,000 $ 437,000 $ 430,000 $ 409,000 $ 1,217,000 $ 451,000 $ 454,000 $ 453,000 $ 1,416,000 $ 1,731,000 $ 7,477,000
Amortization expense after year one $ 0               $ 0