Note 5 - PNC Credit Facility (Details Textual)							1 Months Ended		3 Months Ended		6 Months Ended	9 Months Ended		12 Months Ended		30 Months Ended	34 Months Ended
	Mar. 31, 2017 USD ($)	Aug. 10, 2016 USD ($)	Mar. 29, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 17, 2015 USD ($)	Mar. 29, 2015	Mar. 28, 2015	Sep. 30, 2014 USD ($)	Nov. 30, 2016 USD ($)	Mar. 31, 2016	Jun. 30, 2016	Jun. 30, 2016 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2019	Sep. 30, 2019 USD ($)	Apr. 15, 2017	Mar. 28, 2017 USD ($)	Mar. 03, 2017 USD ($)	Dec. 30, 2016	Mar. 28, 2016 USD ($)	Feb. 27, 2015 USD ($)
Payments of Debt Issuance Costs														$ 50,000	$ 100,000
Long-term Debt				$ 904,768										622,872	904,768
Amortization of Debt Issuance Costs														152,724	125,404
Derivative Liability				163,000										$ 91,000	$ 163,000
Fair Value Hedging [Member] | Interest Rate Swap [Member]
Derivative, Notional Amount					$ 10,000,000
Derivative, Swaption Interest Rate					1.88%
Fair Value Inputs, Discount Rate														13.40%	5.80%
Derivative Liability				163,000										$ 91,000	$ 163,000
Fair Value Hedging [Member] | Interest Rate Swap [Member] | Interest Expense [Member]
Unrealized Gain (Loss) on Derivatives														(72,000)	163,000
Prepaid Expenses and Other Current Assets [Member]
Unamortized Debt Issuance Expense				140,570										170,746	140,570
Other Assets [Member]
Unamortized Debt Issuance Expense				$ 392,300										259,400	392,300
Subordinated Debt [Member] | Scenario, Forecast [Member]
Debt Instrument, Interest Rate, Stated Percentage																		12.00%
Two Thousand Fourteen Credit Agreement [Member]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage													0.375%
Leverage Ratio				4.25		3.5	2.75			4.5	3.5
Debt Instrument, Interest Rate, Increase (Decrease)				0.25%
Maximum Capital Expenditures												$ 7,800,000
Two Thousand Fourteen Credit Agreement [Member] | Domestic Rate Loans [Member]
Long-term Debt				$ 456,241										$ 1,930,514	$ 456,241
Debt Instrument, Interest Rate, Effective Percentage				4.25%										6.75%	4.25%
Two Thousand Fourteen Credit Agreement [Member] | LIBOR Based Loans [Member]
Long-term Debt				$ 20,250,000										$ 21,250,000	$ 20,250,000
Two Thousand Fourteen Credit Agreement [Member] | Base Rate [Member] | Domestic Rate Loans [Member]
Debt Instrument, Interest Rate, Increase (Decrease)			1.75%
Two Thousand Fourteen Credit Agreement [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate					4.50%								4.50%	5.21%	2.92%
Two Thousand Fourteen Credit Agreement [Member] | Minimum [Member] | Base Rate [Member] | Domestic Rate Loans [Member]
Debt Instrument, Basis Spread on Variable Rate					4.50%								3.00%
Two Thousand Fourteen Credit Agreement [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate					5.50%								5.50%	5.27%	3.01%
Two Thousand Fourteen Credit Agreement [Member] | Maximum [Member] | Base Rate [Member] | Domestic Rate Loans [Member]
Debt Instrument, Basis Spread on Variable Rate					5.50%								4.00%
Two Thousand Fourteen Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument, Term								5 years
Line of Credit Facility, Maximum Borrowing Capacity			$ 30,000,000					$ 30,000,000					$ 30,000,000									$ 40,000,000
Line of Credit Facility Limitation on Borrowings Percentage of Eligible Receivables								85.00%					85.00%
Line of Credit Facility Limitation on Borrowings Percentage of Appraised Value of Trucks and Equipment		80.00%						75.00%					75.00%	75.00%							85.00%
Line of Credit, Minimum Monthly Availability									$ 500,000
Line of Credit Facility Limitation on Borrowings Percentage of Appraised Value of Trucks and Equipment, Monthly Reduction		0.50%
Payments of Debt Issuance Costs		$ 200,000
Long-term Debt				20,706,241										$ 23,180,514	$ 20,706,241
Line of Credit Facility, Remaining Borrowing Capacity				$ 9,900,000										$ 4,500,000	$ 9,900,000
Two Thousand Fourteen Credit Agreement [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member]
Debt Instrument, Required Funds to be Raised	$ 1,500,000
Debt Instrument, Letters of Credit Issued	1,500,000
Long-term Debt																			$ 25,700,000
Line of Credit Facility, Remaining Borrowing Capacity																				$ 3,060,000
Two Thousand Fourteen Credit Agreement [Member] | Revolving Credit Facility [Member] | Scenario, Forecast [Member]
Line of Credit, Minimum Monthly Availability																	$ 1,000,000
Debt Covenant, Minimum Fixed Charge Coverage Ratio																1.25
Two Thousand Fourteen Credit Agreement [Member] | Revolving Credit Facility [Member] | Subordinated Debt [Member] | Subsequent Event [Member]
Debt Instrument, Required Additional Funds to be Raised	$ 1,000,000
Two Thousand Fourteen Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Line of Credit, Minimum Monthly Availability		658,000	1,500,000
Two Thousand Fourteen Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Line of Credit, Minimum Monthly Availability		$ 3,500,000	$ 8,000,000
Two Thousand Twelve Credit Agreement [Member]
Line of Credit Facility, Maximum Borrowing Capacity								$ 16,000,000					$ 16,000,000
Guaranteed Loan [Member]
Principal Prepayment Eliminate Monthly Fee																							$ 100,000