Prepaid expenses and other current assets, net consisted of the following (in thousands):



	December 31,
	2015		2014
Prepaid expenses	$	9,893	$	6,170
Other current assets, net	169		296
Total prepaid expenses and other current assets, net	$	10,062	$	6,466

Property and equipment, net consisted of the following (in thousands):



	December 31,
	2015			2014
Computer equipment and data center	$	5,383		$	4,293
Purchased software	2,115			1,124
Internally-developed software	1,999			702
Office equipment	587			480
Office furniture	1,529			1,375
Leasehold improvements and other	6,131			3,821
	17,744			11,795
Accumulated depreciation	(6,915		)	(5,550		)
	10,829			6,245
Capital projects in progress	479			297
Total property and equipment, net	$	11,308		$	6,542

Total depreciation expense was $2.3 million, $2.0 million, and $1.8 million for the years ended December 31, 2015, 2014, and 2013, respectively.

Unamortized internally-developed software was $1.7 million and $0.7 million at December 31, 2015 and 2014, respectively. The Company recorded depreciation expense for internally-developed software of $0.3 million, $0.2 million, and $0.1 million for the years ended December 31, 2015, 2014, and 2013, respectively.

Accrued expenses and other current liabilities consisted of the following (in thousands):



	December 31,
	2015		2014
Salaries and related expenses	$	7,581	$	2,436
Accrued interest on Notes (see Note 8)	2,138		2,138
Other	3,287		2,653
Total accrued expenses and other current liabilities	$	13,006	$	7,227

As part of the Strategic Transformation, the Company announced the upcoming departure of its chief executive officer once a permanent successor has been identified. "Salaries and related expenses" included $1.5 million of employee separation costs pursuant to the chief executive officer's employment agreement, to be paid within 60 days of his last day of employment.