Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

New Accounting Pronouncements or Change in Accounting Principle [Line Items]

Schedule of denominator used to compute basic and diluted earnings per share

	For the Year Ended
	December 31,
	2016	2015	2014
Basic earnings per share - weighted average shares	11,503,296	10,977,341	10,591,351
Effect of dilutive securities:
Employee and director restricted stock units	52,701	83,727	143,787
Warrants	—	325,235	572,913
Diluted earnings per share - weighted average shares	11,555,997	11,386,303	11,308,051

Accounting Standards Update 2016-15

New Accounting Pronouncements or Change in Accounting Principle [Line Items]

Schedule of new accounting standards

This resulted in the following increases (decreases) to the total amounts previously reported in the consolidated statements of cash flows (dollars in thousands):

	For the Year Ended
	December 31,
	2015		2014
Cash flows from operating activities:
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	$	—	$	400
Advance billings and customer deposits		3,500		—
Other		175		(313)
Net cash provided by operating activities		3,675		87
Cash flows from investing activities:
Funds released from restricted cash account		(400)		—
Proceeds on sale of investments		—		463
Net cash used in investing activities		(400)		463
Net change in cash, cash equivalents and restricted cash		3,275		550
Cash, cash equivalents and restricted cash, beginning of period		550		—
Cash, cash equivalents and restricted cash, end of period	$	3,825	$	550

Accounting Standards Update 2016-18

New Accounting Pronouncements or Change in Accounting Principle [Line Items]

Schedule of new accounting standards

The following is a reconciliation of cash, cash equivalents and restricted cash reported in the consolidated balance sheets to the total of such amounts in the consolidated statements of cash flows (dollars in thousands):

	December 31,
	2016		2015
Cash and cash equivalents	$	15,821	$	30,312
Restricted cash included in other current assets
Escrow deposits for capacity sales		5,000		—
Restricted cash included in other assets
Escrow deposits for capacity sales		—		3,500
Other		325		325
Total cash, cash equivalents and restricted cash	$	21,146	$	34,137