7. OPERATING LEASES (Detail) - Future minimum lease payments (USD $)	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
2013					$ 685,000
2014				454,000
2015			23,000
2016		5,000
2017	5,000
Total	$ 1,172,000