EARNINGS PER SHARE (Details) - Schedule of Earnings Per Share, Basic and Diluted - shares		3 Months Ended		9 Months Ended
		Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Weighted average shares outstanding:
Basic EPS Shares outstanding (weighted average)		9,185,235	9,104,228	9,164,714	9,059,251
Effect of Dilutive Securities	[1]
Diluted EPS Shares outstanding		9,185,235	9,104,228	9,164,713	9,059,251

[1] For the three and nine-month periods ended January 31, 2021 and 2020 dilutive securities are excluded from the calculation of earnings per share since the inclusion of such shares would be antidilutive due to the net loss for those periods. The exercisable shares excluded for the three and nine months ended January 31, 2021 are 229,000 and 331,000 options, respectively. The effect of dilutive securities would have been 74,684 options and 59,154 options for the three- and nine-month periods ended January 31, 2021, respectively.