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Note 2 - Allowance for Doubtful Accounts Receivable (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Allowance for Credit Losses on Financing Receivables [Table Text Block] |
|  | 201 7 |  |  | 201 6 |  |  | 201 5 |
Balance at the beginning of yea r |  | $ | 1,276 |  |  | $ | 848 |  |  | $ | 680 |
Provision for bad debt s |  |  | 1,002 |  |  |  | 523 |  |  |  | 266 |
Charge-off s |  |  | (901 | ) |  |  | (96 | ) |  |  | (98 | )
Recoverie s |  |  | 5 |  |  |  | 1 |  |  |  | - |
Balance at the end of yea r |  | $ | 1,382 |  |  | $ | 1,276 |  |  | $ | 848 |

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- Definition Tabular disclosure of financing receivables (examples of financing receivables include loans, trade accounts receivable and notes receivable) and activity in the allowance for credit losses account. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- References No definition available. + Details
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