Accrued Expenses and Other Liabilities

12 Months Ended

Dec. 31, 2018

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



	December 31,
	2018		2017
Accrued professional fees	$	246	$	35
Accrued compensation costs	189		129
Accrued sales taxes and regulatory fees	168		259
Other accrued expenses	131		80
Accrued dividends on Series A-2 Preferred Stock	71		59
Accrued communication costs	49		78
Deferred revenue	43		393
Deferred rent expense	13		46
Super G Warrant liability	—		165
Accrued interest expense	—		18
Accrued expenses and other liabilities	$	910	$	1,262

Included in accrued sales taxes and regulatory fees are certain estimated sales and use taxes and regulatory fees and sales taxes and regulatory fees collected from customers that are to be remitted to taxing authorities. Actual payments may vary from our estimates.