Accounts receivables, net and other receivables (Tables)

12 Months Ended

Dec. 31, 2014

Accounts receivables, net and other receivables

Schedule of accounts receivable, net of allowances for doubtful accounts and other receivables

	December 31,
	2014		2013
Trade receivables, net of allowances	$	25,562	$	12,799
Unbilled access fees		2,142		2,036
Unbilled platform service arrangements		213		1,491
Accounts receivable, net	$	27,917	$	16,326
Unbilled access fees	$	115	$	264
Unbilled platform service arrangements		—		16
Non-current other receivables	$	115	$	280

Schedule of allowance for doubtful accounts

	Allowance for Doubtful Accounts
Balance, December 31, 2011	$	177
Additions charged to operations		45
Deductions from reserves, net		(43	)
Balance, December 31, 2012		179
Additions charged to operations		209
Deductions from reserves, net		(43	)
Balance, December 31, 2013		345
Additions charged to operations		191
Deductions from reserves, net		(142	)
Balance, December 31, 2014	$	394