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Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ / shares in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Cash and cash equivalents | $ 428,150 | $ 181,026
Allowance for doubtful accounts | 85,000 | 114,000
Inventories, net | 20,007,488 | 18,865,932
Prepaid expenses | 858,158 | 887,885
Office furniture and equipment | 2,649,280 | 2,591,159
Accumulated depreciation and amortization | 28,120,000 | 26,879,000
Goodwill | 1,473,176 | 1,473,176
Checks written in excess of bank balance | 636,142 | 454,850
Trade payables | 6,679,670 | 5,414,497
Line of credit | 16,582,963 | 13,783,930
Accrued liabilities | 1,866,796 | 2,047,893
Notes payable | $ 399,912 | $ 4,951,581
Preferred Stock, Par value (in dollars per share) | $ 0 | $ 0
Preferred Stock, shares authorized (in shares) | 3,000,000 | 3,000,000
Preferred Stock, shares issued (in shares) | 0 | 0
Preferred Stock, shares outstanding (in shares) | 0 | 0
Common stock, no par value (in dollars per share) | $ 0 | $ 0
Common stock, shares authorized (in shares) | 15,000,000 | 15,000,000
Common stock, shares issued (in shares) | 3,578,885 | 3,578,885
Common stock, shares outstanding (in shares) | 3,535,227 | 3,535,227
Treasury stock, shares (in shares) | 43,658 | 43,658
Variable Interest Entity, Primary Beneficiary, Aggregated Disclosure [Member] |  |
Cash and cash equivalents | $ 57,000 | $ 2,000
Inventories, net | 340,000 | 498,000
Prepaid expenses | 127,000 | 80,000
Office furniture and equipment | 303,000 | 268,000
Accumulated depreciation and amortization | 104,000 | 36,000
Goodwill | 440,000 | 440,000
Checks written in excess of bank balance | 7,000 | 16,000
Trade payables | 62,000 | 144,000
Line of credit | 267,000 | 338,000
Accrued liabilities | 89,000 | 92,000
Notes payable | $ 27,000 | $ 83,000

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