Note 13 - Stock-based Compensation - Summary of Outstanding Unvested RSUs (Details) - Restricted Stock Units (RSUs) [Member] $ / shares in Units, $ in Thousands	6 Months Ended
	Jan. 31, 2025 USD ($) $ / shares shares
Number of Restricted Stock Units (in shares) | shares	1,209,459
Grant Date Fair Value (in dollars per share) | $ / shares	$ 4.7
Remaining Life (Year)	2 years 7 days
Aggregate Intrinsic Value | $	$ 8,538
May 01, 2022 [Member]
Number of Restricted Stock Units (in shares) | shares	19,608
Grant Date Fair Value (in dollars per share) | $ / shares	$ 4.25
Remaining Life (Year)	3 months 29 days
Aggregate Intrinsic Value | $	$ 138
July 29, 2022 [Member]
Number of Restricted Stock Units (in shares) | shares	92,015
Grant Date Fair Value (in dollars per share) | $ / shares	$ 3.98
Remaining Life (Year)	6 months 29 days
Aggregate Intrinsic Value | $	$ 650
July 31, 2023 [Member]
Number of Restricted Stock Units (in shares) | shares	413,593
Grant Date Fair Value (in dollars per share) | $ / shares	$ 3.32
Remaining Life (Year)	1 year 6 months 29 days
Aggregate Intrinsic Value | $	$ 2,920
January 2, 2024 [Member]
Number of Restricted Stock Units (in shares) | shares	778
Grant Date Fair Value (in dollars per share) | $ / shares	$ 6.44
Remaining Life (Year)	2 years 3 days
Aggregate Intrinsic Value | $	$ 5
January 22, 2024 [Member]
Number of Restricted Stock Units (in shares) | shares	8,919
Grant Date Fair Value (in dollars per share) | $ / shares	$ 7.63
Remaining Life (Year)	21 days
Aggregate Intrinsic Value | $	$ 63
March 13, 2024 [Member]
Number of Restricted Stock Units (in shares) | shares	2,288
Grant Date Fair Value (in dollars per share) | $ / shares	$ 6.49
Remaining Life (Year)	2 months 12 days
Aggregate Intrinsic Value | $	$ 16
April 1, 2024 [Member]
Number of Restricted Stock Units (in shares) | shares	20,000
Grant Date Fair Value (in dollars per share) | $ / shares	$ 7.07
Remaining Life (Year)	2 years 3 months
Aggregate Intrinsic Value | $	$ 141
July 26, 2024 [Member]
Number of Restricted Stock Units (in shares) | shares	610,091
Grant Date Fair Value (in dollars per share) | $ / shares	$ 5.49
Remaining Life (Year)	2 years 6 months 25 days
Aggregate Intrinsic Value | $	$ 4,307
September 1, 2024 [Member]
Number of Restricted Stock Units (in shares) | shares	1,063
Grant Date Fair Value (in dollars per share) | $ / shares	$ 5.23
Remaining Life (Year)	8 months 1 day
Aggregate Intrinsic Value | $	$ 8
October 1, 2024 [Member]
Number of Restricted Stock Units (in shares) | shares	16,103
Grant Date Fair Value (in dollars per share) | $ / shares	$ 6.21
Remaining Life (Year)	2 years 9 months
Aggregate Intrinsic Value | $	$ 114
November 5, 2024 Grant Date One [Member]
Number of Restricted Stock Units (in shares) | shares	2,230
Grant Date Fair Value (in dollars per share) | $ / shares	$ 7.12
Remaining Life (Year)	1 year 10 months 2 days
Aggregate Intrinsic Value | $	$ 16
November 5, 2024 Grant Date Two [Member]
Number of Restricted Stock Units (in shares) | shares	14,344
Grant Date Fair Value (in dollars per share) | $ / shares	$ 7.12
Remaining Life (Year)	2 years 10 months 2 days
Aggregate Intrinsic Value | $	$ 101
November 18, 2024 [Member]
Number of Restricted Stock Units (in shares) | shares	431
Grant Date Fair Value (in dollars per share) | $ / shares	$ 8.28
Remaining Life (Year)	10 months 17 days
Aggregate Intrinsic Value | $	$ 3
January 6, 2025 [Member]
Number of Restricted Stock Units (in shares) | shares	5,874
Grant Date Fair Value (in dollars per share) | $ / shares	$ 7.06
Remaining Life (Year)	3 years 7 days
Aggregate Intrinsic Value | $	$ 41
January 27, 2025 [Member]
Number of Restricted Stock Units (in shares) | shares	2,122
Grant Date Fair Value (in dollars per share) | $ / shares	$ 7.07
Remaining Life (Year)	3 years 25 days
Aggregate Intrinsic Value | $	$ 15