The following table presents material balance sheet component balances as of December 31, 2019 and December 31, 2018 (in thousands):



	December 31,
	2019			2018
Prepaid expenses and other current assets
Prepaid expenses	$	7,753		$	7,183
Deposits	870			904
Other	3,270			3,362
Total prepaid expenses and other current assets	$	11,893		$	11,449
Capitalized contract costs
Capitalized contract costs	$	2,903,389		$	2,361,795
Accumulated amortization	(1,688,140		)	(1,246,020		)
Capitalized contract costs, net	$	1,215,249		$	1,115,775
Long-term notes receivables and other assets
RIC receivables, gross	$	148,325		$	143,065
RIC deferred interest	(59,514		)	(34,164		)
Security deposits	6,715			6,586
Investments	—			3,865
Other	301			467
Total long-term notes receivables and other assets, net	$	95,827		$	119,819
Accrued payroll and commissions
Accrued payroll	$	35,666		$	36,753
Accrued commissions	36,976			28,726
Total accrued payroll and commissions	$	72,642		$	65,479
Accrued expenses and other current liabilities
Accrued interest payable	$	31,327		$	28,885
Current portion of derivative liability	80,366			67,710
Service warranty accrual	8,680			8,813
Current portion of Term Loan	8,100			8,100
Blackstone monitoring fee, a related party	—			4,793
Accrued taxes	5,462			5,351
Accrued payroll taxes and withholdings	5,361			5,097
Loss contingencies	1,831			3,131
Other	6,362			4,835
Total accrued expenses and other current liabilities	$	147,489		$	136,715