SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Narrative (Detail) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2016 USD ($) segment $ / shares shares	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($) segment	Jul. 21, 2014 $ / shares
Significant Accounting Policies [Line Items]
Inventory Valuation Reserves	$ 100		$ 100
Capitalized Software Development Costs for Software Sold to Customers	2,100		$ 1,900
Capitalized Computer Software, Amortization	0	$ 300
Research and development costs	900	600
Impairment charges	$ 6,980	$ 0
Number of repoting segments | segment	1		2
Minimum
Significant Accounting Policies [Line Items]
Invoice Terms	10 days
Estimated useful lives of property and equipment	3 years
Estimated useful lives of intangible assets	1 year
Percentage of contracts issued by US Government	90.00%
Recognition of tax liability or benefits	50.00%
Maximum
Significant Accounting Policies [Line Items]
Invoice Terms	90 days
Estimated useful lives of property and equipment	7 years
Estimated useful lives of intangible assets	7 years
Convertible Debt [Member] | Convertible Senior 2019 Notes [Member]
Significant Accounting Policies [Line Items]
Initial conversion price | $ / shares	$ 14.83			$ 14.83
Convertible Debt Securities [Member]
Significant Accounting Policies [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares	10.1
Commercial Cyber Solutions
Significant Accounting Policies [Line Items]
Impairment charges	$ 7,000		$ 8,000
Commercial Cyber Solutions | Minimum
Significant Accounting Policies [Line Items]
Other Restructuring Costs	5,000
Commercial Cyber Solutions | Maximum
Significant Accounting Policies [Line Items]
Other Restructuring Costs	7,000
SETA
Significant Accounting Policies [Line Items]
Cash received for sale of business	11,000
Goodwill	$ 7,200