Accounts receivables, net and other receivables (Tables)

12 Months Ended

Dec. 31, 2012

Accounts receivables, net and other receivables

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

	December 31,
	2012		2011
Trade receivables, net of allowances	$	10,977	$	7,382
Unbilled platform service arrangements, current	$	—	$	68
Unbilled access fees	$	—	$	1,985
Unbilled platform service arrangements		396		166
Non-current other receivables	$	396	$	2,151

Schedule of allowance for doubtful accounts

	Allowance for Doubtful Accounts
Balance, December 31, 2009	$	617
Additions charged to operations		44
Deductions from reserves, net		(554	)
Balance, December 31, 2010		107
Additions charged to operations		115
Deductions from reserves, net		(45	)
Balance, December 31, 2011		177
Additions charged to operations		45
Deductions from reserves, net		(43	)
Balance, December 31, 2012	$	179