Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands |
Mar. 29, 2020 |
Dec. 29, 2019 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Accounts receivable, allowance for doubtful accounts | $ 116 | $ 595 |
| Notes receivable, net of allowance | 37 | 37 |
| Notes receivable - noncurrent, net of allowance for doubtful accounts | 86 | 112 |
| Dividends payable to related parties, current | 186 | 149 |
| Dividends payable to related parties, noncurrent | $ 114 | $ 99 |
| Common stock, par value | $ 0.0001 | $ 0.0001 |
| Common stock, shares authorized | 25,000,000 | 25,000,000 |
| Common stock, shares issued | 11,876,659 | 11,860,299 |
| Common stock, shares outstanding | 11,876,659 | 11,860,299 |