COMMITMENTS AND CONTINGENCIES - Additional Information (Details) $ in Thousands				3 Months Ended			6 Months Ended
	Apr. 21, 2017 USD ($) installment	Jun. 08, 2015 USD ($)	Nov. 21, 2013 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Schedule of Investments [Line Items]
Deferred rent payable				$ 53			$ 53		$ 69
Rent expense				181		$ 202	375	$ 398
Rental income				89		$ 86	177	172
Cash investments							0	$ 250
Avira, Inc.
Schedule of Investments [Line Items]
Sale of patent in license agreement	$ 3,900
Number of quarterly installments | installment	12
Installment amount payable	$ 325
Payable period	3 years
Venture Capital Funds
Schedule of Investments [Line Items]
Capital commitment			$ 5,000	$ 2,700			$ 2,700
Percentage of limited partnership interest			10.00%
Cash distribution		$ 800
Gross entitlement		1,300
Remainder of gross entitlement reinvested		500
Cash investments		2,300
Total investment		$ 2,600
Distribution received from JVP					$ 130