The following table presents material balance sheet component balances (in thousands):



	June 30, 2019			December 31, 2018
Prepaid expenses and other current assets
Prepaid expenses	$	14,112		$	7,183
Deposits	1,793			904
Other	1,083			3,362
Total prepaid expenses and other current assets	$	16,988		$	11,449
Capitalized contract costs
Capitalized contract costs	$	2,632,597		$	2,361,795
Accumulated amortization	(1,461,910		)	(1,246,020		)
Capitalized contract costs, net	$	1,170,687		$	1,115,775
Long-term notes receivables and other assets
RIC receivables, gross	$	146,457		$	143,065
RIC deferred interest	(31,652		)	(34,164		)
Security deposits	6,985			6,586
Investments	541			3,865
Other	300			467
Total long-term notes receivables and other assets, net	$	122,631		$	119,819
Accrued payroll and commissions
Accrued commissions	$	42,611		$	28,726
Accrued payroll	26,937			36,753
Total accrued payroll and commissions	$	69,548		$	65,479
Accrued expenses and other current liabilities
Accrued interest payable	$	25,764		$	28,885
Current portion of derivative liability	70,468			67,710
Service warranty accrual	8,835			8,813
Current portion of notes payable	8,100			8,100
Loss contingencies	1,831			3,131
Other	23,051			20,076
Total accrued expenses and other current liabilities	$	138,049		$	136,715