CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
OPERATING REVENUES:
Local Service	$ 1,613,794us-gaap_SalesRevenueServicesNet	$ 1,636,349us-gaap_SalesRevenueServicesNet
Network Access	3,071,854nulm_NetworkAccess	3,209,114nulm_NetworkAccess
Video	2,193,916nulm_Video	1,928,972nulm_Video
Data	2,436,246nulm_Data	1,938,129nulm_Data
Long Distance	187,748nulm_LongDistance	205,198nulm_LongDistance
Other Non-Regulated	984,059us-gaap_OtherSalesRevenueNet	1,061,439us-gaap_OtherSalesRevenueNet
Total Operating Revenues	10,487,617us-gaap_SalesRevenueNet	9,979,201us-gaap_SalesRevenueNet
OPERATING EXPENSES:
Plant Operations (Excluding Depreciation and Amortization)	1,990,277us-gaap_CostOfServices	1,964,577us-gaap_CostOfServices
Cost of Video	1,967,378nulm_CostOfVideo	1,713,184nulm_CostOfVideo
Cost of Data	525,753nulm_CostOfData	323,538nulm_CostOfData
Cost of Other Nonregulated Services	489,242us-gaap_OtherCostOfServices	534,733us-gaap_OtherCostOfServices
Depreciation and Amortization	2,430,081	2,331,781
Selling, General and Administrative	1,940,565	1,833,508
Total Operating Expenses	9,343,296us-gaap_CostsAndExpenses	8,701,321us-gaap_CostsAndExpenses
OPERATING INCOME	1,144,321us-gaap_OperatingIncomeLoss	1,277,880us-gaap_OperatingIncomeLoss
OTHER (EXPENSE) INCOME
Interest Expense	(359,341)us-gaap_InterestExpense	(235,107)us-gaap_InterestExpense
Interest Income	55,152us-gaap_InvestmentIncomeInterest	86,122us-gaap_InvestmentIncomeInterest
Interest During Construction	4,482nulm_InterestDuringConstruction	3,165nulm_InterestDuringConstruction
CoBank Patronage Dividends	409,132us-gaap_InvestmentIncomeDividend	435,319us-gaap_InvestmentIncomeDividend
Other Investment Income	48,533nulm_OtherInvestmentIncome	49,622nulm_OtherInvestmentIncome
Total Other Income (Expense)	157,958us-gaap_NonoperatingIncomeExpense	339,121us-gaap_NonoperatingIncomeExpense
INCOME BEFORE INCOME TAXES	1,302,279	1,617,001
INCOME TAXES	469,059us-gaap_IncomeTaxExpenseBenefit	679,141us-gaap_IncomeTaxExpenseBenefit
NET INCOME	$ 833,220us-gaap_NetIncomeLoss	$ 937,860us-gaap_NetIncomeLoss
BASIC AND DILUTED
NET INCOME PER SHARE (in Dollars per share)	$ 0.16us-gaap_EarningsPerShareBasicAndDiluted	$ 0.18us-gaap_EarningsPerShareBasicAndDiluted
DIVIDENDS PER SHARE (in Dollars per share)	$ 0.0850	$ 0.0850
WEIGHTED AVERAGE SHARES OUTSTANDING (in Shares)	5,101,334	5,089,534

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