COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands		12 Months Ended
	Mar. 12, 2015 $ / violation	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Increase in royalties payable		$ 400	$ 400	$ 400
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2017		2,090
2018		1,970
2019		1,810
2020		1,696
2021		1,677
Thereafter		3,202
Total operating lease, future minimum payments		12,445
Rent expense		2,000	2,000	$ 1,900
Loss Contingencies [Line Items]
Warranty reserve		$ 400	$ 400
Inventories | Scenario, Forecast
Recorded Unconditional Purchase Obligation [Line Items]
Annual minimum inventory purchases					$ 300	$ 600
Minimum | Illinois Junk Fax Litigation
Loss Contingencies [Line Items]
Estimate of possible loss, charge per violation | $ / violation	500