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CASH AND EQUIVALENTS AND MARKETABLE SECURITIES (Tables) | 6 Months Ended
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Jun. 30, 2018
Cash and Equivalents and Marketable Securities Disclosure [Abstract] |
Cash Cash Equivalents and Marketable Securities Table | Investments in available-for-sale marketable debt securities are as follows at June 30, 2018 and December 30, 2017:
| Amortized Cost |  | Unrealized Losses |  | Fair Value
| 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
U.S. government and agency backed securities | $ | 23,827,644 |  |  | $ | 35,014,593 |  |  | $ | (409,130 | ) |  | $ | (288,782 | ) |  | $ | 23,418,514 |  |  | $ | 34,725,811 |
Corporate debt | 7,268,186 |  |  | 8,988,608 |  |  | (5,571 | ) |  | (7,702 | ) |  | 7,262,615 |  |  | 8,980,906 |
Certificates of deposit | — |  |  | 201,000 |  |  | — |  |  | (260 | ) |  | — |  |  | 200,740 |
Total | $ | 31,095,830 |  |  | $ | 44,204,201 |  |  | $ | (414,701 | ) |  | $ | (296,744 | ) |  | $ | 30,681,129 |  |  | $ | 43,907,457 |
Marketable Debt Securities | The contractual maturity of the Company’s marketable debt securities is as follows at June 30, 2018:
| Less than One year |  | One to Five years |  | Greater than Five years |  | Total
U.S. government and agency backed securities | $ | 11,991,930 |  |  | $ | 11,426,584 |  |  | $ | — |  |  | $ | 23,418,514 |
Corporate debt | 1,042,161 |  |  | 6,220,454 |  |  | — |  |  | 7,262,615 |
Total | $ | 13,034,091 |  |  | $ | 17,647,038 |  |  | $ | — |  |  | $ | 30,681,129 |

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- Definition Cash and Equivalents and Marketable Securities Disclosure [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References No definition available. + Details
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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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