Note 7 - Debt (Details Textual)			1 Months Ended		12 Months Ended
	Nov. 11, 2019 USD ($) $ / shares shares	Aug. 10, 2017 USD ($)	Nov. 30, 2019 USD ($)	Oct. 31, 2019 USD ($)	Dec. 31, 2019 USD ($) $ / shares	Dec. 31, 2018 USD ($)	Jan. 06, 2020 USD ($)	Nov. 12, 2019 USD ($) $ / shares shares	Aug. 12, 2019 USD ($)	Aug. 11, 2019 USD ($)	Jun. 30, 2019 USD ($)
Line of Credit, Current					$ 33,994,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares					$ 0.22
Interest Expense [Member]
Amortization of Debt Issuance Costs					$ 140,000	105,000
Other Assets [Member]
Unamortized Debt Issuance Expense					82,000	$ 208,000
Warrant In Connection With Amended Subordinated Loan [Member]
Warrants and Rights Outstanding, Term								5 years
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares	625,000							625,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 0.20							$ 0.20
The 2017 Credit Agreement [Member] | East West Bank [Member] | Revolving Credit Facility [Member]
Debt Instrument, Term		3 years
Line of Credit Facility, Maximum Borrowing Capacity		$ 37,000,000
Line of Credit Facility, Maximum Borrowing Capacity, Percent of Eligible Receivables		85.00%
Line of Credit Facility, Maximum Borrowing Capacity, Percentage of Trucks and Equipment		85.00%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.50%
Line of Credit, Current					$ 34,000,000		$ 34,000,000
Line of Credit Facility, Interest Rate at Period End					5.47%
Line of Credit Facility, Remaining Borrowing Capacity					$ 663,000
Line of Credit Facility, Excess Borrowing Over Borrowing Capacity											$ 753,000
Line of Credit Facility, Allowable Capital Expenditures									$ 1,500,000	$ 3,000,000
Line of Credit Facility, Covenant Compliance, Minimum Fixed Charge Coverage Ratio		1.1
Line of Credit Facility, Covenant Compliance, Trailing Twelve Month Fixed Charge Coverage Ratio		1.2	110	1.1
Line of Credit Facility, Covenant Compliance, Minimum Liquidity		$ 1,500,000	$ 1,500,000	$ 1,500,000
The 2017 Credit Agreement [Member] | East West Bank [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate		3.50%
Line of Credit, Current					$ 28,000,000
Line of Credit Facility, Interest Rate at Period End					6.75%
The 2017 Credit Agreement [Member] | East West Bank [Member] | Revolving Credit Facility [Member] | Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate		1.75%
Line of Credit, Current					$ 6,000,000
Amended Subordinated Loan [Member] | Cross River Partners, L.P. [Member] | Subordinated Debt [Member]
Debt Instrument, Increase (Decrease), Net, Total	$ 500,000
Debt Instrument, Face Amount	$ 2,000,000							$ 2,500,000