XML 101 R82.htm IDEA: XBRL DOCUMENT v3.8.0.1
COMMITMENTS AND CONTINGENCIES - Future Minimum Lease Payments Under All Non-Cancelable Operating Leases (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Leases      
2017 $ 1,416    
2018 1,082    
2019 1,038    
2020 921    
2021 537    
Future minimum lease payments 4,994    
Rent expense      
Rent expense 1,400 $ 1,600 $ 1,800
India Department of Telecommunication Security and Supply Chain Standards      
Revenues from security agreements 86,512 117,103 129,420
Cost of goods sold 58,156 89,235 107,292
Equipment revenue 61,735 87,361 105,988
Cost of Goods Sold 41,472 65,891 84,988
Equipment based service revenue 24,777 29,742 23,432
Cost of Services $ 16,684 23,344 22,304
Security agreement with customers, as required by India's Department of Telecommunications ("DOT")      
India Department of Telecommunication Security and Supply Chain Standards      
Revenues from security agreements   11,800  
Deferred revenue related to contracts covered by security agreements   0 11,700
Deferred costs related to contracts covered by security agreements   $ 0 $ 5,700
Revenue Recognition, assessment period   5 years  
Cost of goods sold   $ 5,400  
Equipment revenue   5,600  
Cost of Goods Sold   5,400  
Equipment based service revenue   6,200  
Cost of Services   $ 10