Other Expenses (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Income And Expenses [Abstract]
Legal and professional fees	[1]	$ 660	$ 645	$ 2,561
Printing and stockholder communications	[1]	188	176	596
Directors and Officers insurance		498	499	509
DERs expense		406	376	323
Amortization of restricted stock		337	97	97
Software implementation and maintenance	[2]	827	333	315
Administrative service fees		153	162	191
Rent		511	505	502
Stock exchange and filing fees		157	172	180
Custodian and clearing fees		232	273	284
Sarbanes-Oxley consulting fees		128	125	107
Commissions - Eurodollar Futures Contracts		44	41	15
Board of directors fees and expenses		311	346	350
Securities data services		401	355	176
Leasing commissions on rental properties		51	65	73
Other expenses on rental properties		254	230	158
Depreciation expense on rental properties		452	441	235
Property insurance on rental properties		112	117	66
Management fee for rental properties		168	159	50
Property taxes on rental properties		307	233	98
Recovery on Lehman receivable		(58)	(346)	(38)
Other		197	185	160
Total		$ 6,336	$ 5,189	$ 7,008

[1] The increase during 2014 was primarily related to the Company’s proxy solicitation contest during 2014.

[2] The increase during 2016 was primarily to the increase in license acquisition, implementation and conversion to a new portfolio accounting system.