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Notes Payable (Tables) | 12 Months Ended
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Dec. 31, 2017
Debt Instrument [Line Items] |
Components of Notes Payable | The components of notes payable at December 31, 2017 and 2016 are as follows:
| 2017 |  |  | 2016 |
| (In thousands) |
Short-term note payable...................................... |  | 354 |  |  |  | - |
Revolving credit agreement | $ | - |  |  | $ | 1,500 |
Current portion of long-term notes payable...................................... |  | 270 |  |  |  | 300 |
Long-term notes payable |  | 6,230 |  |  |  | 3,900 |
Principal balance of notes payable |  | 6,854 |  |  |  | 5,700 |
Warrants issued as part of debt refinancing |  | (365) |  |  |  | - |
Loan cost capitalization |  | (341) |  |  |  | - |
Total notes payable, net | $ | 6,148 |  |  | $ | 5,700 |
Schedule of Principal Payments of Debt | Principal payments of debt for years subsequent to 2017 are as follows (in thousands):
| Amount |
| (In thousands) |
2018 | $ | 624 |
2019 |  | 360 |
2020 |  | 360 |
2021 |  | 5,510 |
2022 |  | - |
| $ | 6,854 |
Warrant |
Debt Instrument [Line Items] |
Warrants Calculated Using the Black Scholes Merton Pricing Model | The fair value of the warrants was calculated using the Black Scholes-Merton pricing model using the following weighted average assumptions, at the grant date:
Number of warrants |  | 500,000 |
Exercise price | $ | 2.26 |
Expected volatility of underlying stock |  | 72 | %
Risk-free interest rate |  | 2.08 | %
Dividend yield |  | 0 | %
Expected life of warrants |  | 5 years |
Weighted-average fair value of warrants | $ | 0.73 |
Expiration date |  | November 13, 2022 |

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- Definition Tabular disclosure of the inputs and valuation techniques used to measure fair value, and a discussion of changes in valuation techniques and related inputs, if any, applied during the period to each separate class of assets, liabilities, and financial instruments classified in shareholders' equity that are measured on a recurring and/or nonrecurring basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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