Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Revenue
Revenue	$ 211,463	$ 233,046	$ 417,306	$ 436,227
Cost of Sales
Total cost of sales	140,222	145,696	269,456	270,572
Gross profit	71,241	87,350	147,850	165,655
Operating expenses
Selling and marketing	30,131	33,395	62,850	65,484
General and administrative	25,997	22,105	47,690	43,183
Research and development	7,143	7,676	14,182	14,848
Total operating expenses	63,271	63,176	124,722	123,515
Income from operations	7,970	24,174	23,128	42,140
Interest income (expense), net	(8,857)	(7,368)	(17,129)	(14,186)
Other income (expense), net	(182)	270	(613)	319
Income (loss) before income taxes	(1,069)	17,076	5,386	28,273
Income tax provision	2	2,916	1,151	3,612
Net income (loss)	$ (1,071)	$ 14,160	$ 4,235	$ 24,661
Basic
Earnings (loss) per share (in dollars per share)	$ (0.06)	$ 0.74	$ 0.22	$ 1.28
Weighted average common shares outstanding (in shares)	19,193	19,251	19,169	19,234
Diluted
Earnings (loss) per share (in dollars per share)	$ (0.06)	$ 0.73	$ 0.22	$ 1.27
Weighted average common shares outstanding (in shares)	19,361	19,441	19,361	19,393
Dividends declared per share (in dollars per share)	$ 0.30	$ 0.30	$ 0.60	$ 0.60
Product
Revenue
Revenue	$ 183,223	$ 206,690	$ 362,081	$ 381,769
Cost of Sales
Cost of goods and services sold	121,206	129,579	232,845	237,746
Service
Revenue
Revenue	28,240	26,356	55,225	54,458
Cost of Sales
Cost of goods and services sold	$ 19,016	$ 16,117	$ 36,611	$ 32,826