How to identify material differences between reported operating cash flow and sustainable operating cash flow?

What I don't know is ...

1. How to set materiality

2. How to lead sustainable operating cash flow

In the above cash flow, all the related elements such as AP and AR seem reasonable for me because cash generates while paying AP and collecting not an excessive amount of AR.

1,813 20 6 509 O Cash flows from operating activities: Net income (loss) Adjustments to reconcile net income (loss) to net cash provided by operating activities: Deferred income taxes Provision for inventories Depreciation and amortization Loss on disposal of property and equipment Amortization and write-off of capitalized software development costs and intellectual property licenses Premium payment for early redemption of note Amortization of debt discount and debt financing costs Stock-based compensation expense Other Changes in operating assets and liabilities: Accounts receivable Inventories Software development and intellectual property licenses Other assets Deferred revenues Accounts payable Accrued expenses and other liabilities Net cash provided by operating activities 489 0 46 209 1 (114) (5) (372) (51) (122) (65) (574) 1,790