Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
State rate change	$ 149,015	$ (346,149)	$ 0
Change in valuation allowance	(397,619)	(237,557)	(262,343)
Carryover tax basis amount	20,000,000
Net Operating Loss Carry Forwards Expiration Dates	net operating losses begin to expire in 2024
Deferred Tax Assets, Valuation Allowance	96,000
Domestic Tax Authority [Member]
Net operating loss carryover	22,500,000
State and Local Jurisdiction [Member]
Net operating loss carryover	66,800,000
State deferred tax asset valuation allowance, against the state net operating loss carryover	4,700,000
State deferred tax asset valuation allowance on the carryover tax basis of the subsidiaries	1,700,000
Frontier Utilities [Member]
Deferred Tax Assets, Operating Loss Carryforwards	98,000,000
Valuation allowance percentage	100.00%
Net increase to valuation allowance	1,761,514
Change in valuation allowance	237,557
Total expense from the change in valuation allowance	1,523,957
North Carolina And Kentucky [Member]
State rate change	336,007
NORTH CAROLINA [Member] | Frontier Utilities [Member]
Increase in deferred tax asset allowance	$ 1,970,586