Unaudited Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (326)	$ 709	$ (1,010)	$ 833
Other comprehensive (loss) income:
Unrealized (loss) gain on available-for-sale securities	(11)	182	58	384
Unrealized loss on interest rate swap	(366)	(1,960)	(4,325)	(2,693)
Other comprehensive loss before taxes	(377)	(1,778)	(4,267)	(2,309)
Benefit for income taxes related to other comprehensive income items	106	372	1,166	484
Other comprehensive loss	(271)	(1,406)	(3,101)	(1,825)
Comprehensive loss	(597)	(697)	(4,111)	(992)
Comprehensive income attributable to non-controlling interests	7	2	5	7
Comprehensive loss attributable to common stockholders	$ (604)	$ (699)	$ (4,116)	$ (999)