Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands | Series E Preferred Stock [Member]Preferred Stock Including Additional Paid in Capital [Member] | Series E Preferred Stock [Member]Common Stock Including Additional Paid in Capital [Member] | Series E Preferred Stock [Member]Retained Earnings [Member] | Series E Preferred Stock [Member] | Series B Preferred Stock [Member]Preferred Stock Including Additional Paid in Capital [Member] | Series B Preferred Stock [Member]Common Stock Including Additional Paid in Capital [Member] | Series B Preferred Stock [Member]Retained Earnings [Member] | Series B Preferred Stock [Member] | Preferred Stock Including Additional Paid in Capital [Member] | Common Stock Including Additional Paid in Capital [Member] | Retained Earnings [Member] | Total |
Balance (in shares) at Mar. 31, 2018 | | | | | | | | | 62,334 | 687,510 | | |
Balance at Mar. 31, 2018 | | | | | | | | | $ 3,613 | $ 25,200 | $ (28,682) | $ 131 |
Cumulative effect of ASC 606 adoption at Mar. 31, 2018 | | | | | | | | | | | 1,176 | 1,176 |
Net income (loss) | | | | | | | | | | | (267) | (267) |
Share based compensation | | | | | | | | | | $ 57 | | 57 |
Warrant exercises, net of issuance costs (in shares) | | | | | | | | | | 4,020 | | |
Warrant exercises, net of issuance costs | | | | | | | | | | $ 15 | | 15 |
Equity issuance for PFG Loan (in shares) | | | | | | | | | | 500 | | |
Equity issuance for PFG Loan | | | | | | | | | | | | |
Restricted stock granted (in shares) | | | | | | | | | | 2,567 | | |
Restricted stock granted | | | | | | | | | | | | |
Stock issuance, net of offering costs (in shares) | | | | | | | | | 8,800 | | | |
Stock issuance, net of offering costs | | | | | | | | | $ 205 | | | 205 |
Series E dividends | | | | | | | | | | | (20) | (20) |
Balance (in shares) at Jun. 30, 2018 | | | | | | | | | 71,134 | 694,597 | | |
Balance at Jun. 30, 2018 | | | | | | | | | $ 3,818 | $ 25,272 | (27,793) | 1,297 |
Balance (in shares) at Mar. 31, 2018 | | | | | | | | | 62,334 | 687,510 | | |
Balance at Mar. 31, 2018 | | | | | | | | | $ 3,613 | $ 25,200 | (28,682) | 131 |
Cumulative effect of ASC 606 adoption at Mar. 31, 2018 | | | | | | | | | | | 1,176 | 1,176 |
Net income (loss) | | | | | | | | | | | | (1,017) |
Balance (in shares) at Dec. 29, 2018 | | | | | | | | | 98,934 | 733,101 | | |
Balance at Dec. 29, 2018 | | | | | | | | | $ 4,350 | $ 25,448 | (28,592) | 1,206 |
Balance (in shares) at Mar. 31, 2018 | | | | | | | | | 62,334 | 687,510 | | |
Balance at Mar. 31, 2018 | | | | | | | | | $ 3,613 | $ 25,200 | (28,682) | 131 |
Cumulative effect of ASC 606 adoption at Mar. 31, 2018 | | | | | | | | | | | 1,176 | 1,176 |
Stock issuance, net of offering costs (in shares) | | | | 57,200 | | | | | | | | |
Balance (in shares) at Mar. 30, 2019 | | | | | | | | | 116,934 | 757,367 | | |
Balance at Mar. 30, 2019 | | | | | | | | | $ 4,806 | $ 25,557 | (28,548) | 1,815 |
Balance (in shares) at Jun. 30, 2018 | | | | | | | | | 71,134 | 694,597 | | |
Balance at Jun. 30, 2018 | | | | | | | | | $ 3,818 | $ 25,272 | (27,793) | 1,297 |
Net income (loss) | | | | | | | | | | | (260) | (260) |
Share based compensation | | | | | | | | | | $ 46 | | 46 |
Warrant exercises, net of issuance costs (in shares) | | | | | | | | | | 34,171 | | |
Warrant exercises, net of issuance costs | | | | | | | | | | $ 97 | | 97 |
Equity issuance for PFG Loan (in shares) | | | | | | | | | | 500 | | |
Equity issuance for PFG Loan | | | | | | | | | | | | |
Stock issuance, net of offering costs (in shares) | | | | | | | | | 17,400 | | | |
Stock issuance, net of offering costs | | | | | | | | | $ 371 | | | 371 |
Series E dividends | | | | | | | | | | | (22) | (22) |
Balance (in shares) at Sep. 29, 2018 | | | | | | | | | 88,534 | 729,268 | | |
Balance at Sep. 29, 2018 | | | | | | | | | $ 4,189 | $ 25,415 | (28,075) | 1,529 |
Net income (loss) | | | | | | | | | | | (490) | (490) |
Share based compensation | | | | | | | | | | $ 33 | | 33 |
Equity issuance for PFG Loan (in shares) | | | | | | | | | | 500 | | |
Equity issuance for PFG Loan | | | | | | | | | | | | |
Restricted stock granted (in shares) | | | | | | | | | | 3,333 | | |
Restricted stock granted | | | | | | | | | | | | |
Stock issuance, net of offering costs (in shares) | | | | | | | | | 10,400 | | | |
Stock issuance, net of offering costs | | | | | | | | | $ 161 | | | 161 |
Series E dividends | | | | | | | | | | | (27) | (27) |
Balance (in shares) at Dec. 29, 2018 | | | | | | | | | 98,934 | 733,101 | | |
Balance at Dec. 29, 2018 | | | | | | | | | $ 4,350 | $ 25,448 | (28,592) | 1,206 |
Balance (in shares) at Mar. 30, 2019 | | | | | | | | | 116,934 | 757,367 | | |
Balance at Mar. 30, 2019 | | | | | | | | | $ 4,806 | $ 25,557 | (28,548) | 1,815 |
Net income (loss) | | | | | | | | | | | 52 | 52 |
Share based compensation | | | | | | | | | | $ 95 | | 95 |
Equity issuance for PFG Loan (in shares) | | | | | | | | | | 167 | | |
Equity issuance for PFG Loan | | | | | | | | | | | | |
Series E dividends | | | | | | | | | | | (37) | (37) |
Balance (in shares) at Jun. 29, 2019 | | | | | | | | | 116,934 | 756,201 | | |
Balance at Jun. 29, 2019 | | | | | | | | | $ 4,804 | $ 25,654 | (28,533) | 1,925 |
Restricted stock forfeited (in shares) | | | | | | | | | | (1,333) | | |
Restricted stock forfeited | | | | | | | | | | | | |
Series E preferred stock issuance, reclass of offering costs | | | | | | | | | $ (2) | $ 2 | | |
Balance (in shares) at Mar. 30, 2019 | | | | | | | | | 116,934 | 757,367 | | |
Balance at Mar. 30, 2019 | | | | | | | | | $ 4,806 | $ 25,557 | (28,548) | 1,815 |
Net income (loss) | | | | | | | | | | | | (24) |
Stock issuance, net of offering costs (in shares) | | | | 0 | | | | | | | | |
Balance (in shares) at Dec. 28, 2019 | | | | | | | | | 26,982 | 2,476,900 | | |
Balance at Dec. 28, 2019 | | | | | | | | | $ 2,922 | $ 31,369 | (29,908) | 4,383 |
Balance (in shares) at Jun. 29, 2019 | | | | | | | | | 116,934 | 756,201 | | |
Balance at Jun. 29, 2019 | | | | | | | | | $ 4,804 | $ 25,654 | (28,533) | 1,925 |
Net income (loss) | | | | | | | | | | | 80 | 80 |
Share based compensation | | | | | | | | | | $ 67 | | 67 |
Warrant exercises, net of issuance costs (in shares) | | | | | | | | | | 81,808 | | |
Warrant exercises, net of issuance costs | | | | | | | | | | $ 230 | | 230 |
Series E dividends | | | | | | | | | | | (36) | |
Balance (in shares) at Sep. 28, 2019 | | | | | | | | | 115,582 | 881,012 | | |
Balance at Sep. 28, 2019 | | | | | | | | | $ 4,623 | $ 26,279 | (28,494) | 2,408 |
Series E dividends (in shares) | | | | | | | | | | 33,991 | | |
Series E dividends | | | | | | | | | | $ 142 | | 106 |
Preferred stock converted to common stock (in shares) | (600) | | | | (752) | | | | | | | |
Preferred stock converted to common stock | $ (15) | | | | $ (166) | | | | | | | |
Preferred stock converted to common stock (in shares) | | 4,000 | | | | 5,012 | | | | | | |
Preferred stock converted to common stock | | $ 20 | | | | $ 166 | | | | | | |
Preferred stock converted to common stock | | | $ (5) | | | | | | | | | |
Net income (loss) | | | | | | | | | | | (156) | (156) |
Share based compensation | | | | | | | | | | $ 67 | | 67 |
Warrant exercises, net of issuance costs (in shares) | | | | | | | | | | | | |
Warrant exercises, net of issuance costs | | | | | | | | | | $ (18) | | (18) |
Stock issuance, net of offering costs (in shares) | | | | | | | | | | 699,333 | | |
Stock issuance, net of offering costs | | | | | | | | | | $ 2,053 | | 2,053 |
Series E dividends | | | | | | | | | | | (18) | |
Balance (in shares) at Dec. 28, 2019 | | | | | | | | | 26,982 | 2,476,900 | | |
Balance at Dec. 28, 2019 | | | | | | | | | $ 2,922 | $ 31,369 | (29,908) | 4,383 |
Series E dividends (in shares) | | | | | | | | | | 10,636 | | |
Series E dividends | | | | | | | | | | $ 47 | | 29 |
Preferred stock converted to common stock (in shares) | | | | | | | | | (88,600) | | | |
Preferred stock converted to common stock | | | | | | | | | $ (1,701) | | | |
Preferred stock converted to common stock (in shares) | | | | | | | | | | 886,000 | | |
Preferred stock converted to common stock | | | | | | | | | | $ 2,941 | | |
Preferred stock converted to common stock | | | | | | | | | | | $ (1,240) | |
Fractional shares due to reverse split (in shares) | | | | | | | | | | (81) | | |