| May 31,
2012 | May 31,
2013 | May 31,
2014 | May 31,
2015 | May 31,
2016 | May 31,
2017 | May 31,
2018 | May 31,
2019 | May 31,
2020 | May 31,
2021 | May 31,
2022 | May 31,
2023 |
|---|
| Net loss | -5 | -1 | 3 | -3 | -44 | 5 | 16 | 61 | -167 | -32 | -27 | -52 |
|---|
| Depreciation and amortization | 13 | 25 | 25 | 30 | 28 | 25 | 23 | 26 | 24 | 26 | 29 | 31 |
|---|
| Noncash Lease Expense | - | - | - | - | - | - | - | - | 2 | 2 | 2 | 2 |
|---|
| Goodwill impairment | - | - | - | - | - | - | - | - | 159 | - | - | 15 |
|---|
| Stock based compensation | 4 | 5 | 5 | 6 | 3 | 6 | 8 | 9 | 8 | 9 | 11 | 11 |
|---|
| Change in fair value of contingent consideration | - | 2 | -2 | -8 | 1 | -15 | 0 | -7 | -12 | 0 | 1 | 2 |
|---|
| Deferred income tax provision | - | 1 | 3 | -5 | 40 | 4 | -9 | -3 | -2 | -5 | -4 | -2 |
|---|
| Changes in accounts receivable allowances | 0 | 0 | 0 | 1 | 2 | -0 | 0 | -0 | 0 | 0 | 0 | 1 |
|---|
| Asset impairments and disposals | - | - | - | 9 | 1 | 4 | 1 | 2 | 1 | 14 | 0 | 0 |
|---|
| Other | -1 | -0 | 0 | -0 | -0 | 1 | 1 | 0 | -0 | 0 | 0 | 1 |
|---|
| Accounts receivable | 2 | -1 | 15 | -2 | -3 | -8 | -5 | 3 | -12 | 4 | 17 | 1 |
|---|
| Inventories | 1 | 2 | 5 | 6 | -12 | -1 | -6 | 1 | 19 | -12 | 3 | 8 |
|---|
| Prepaid expenses and other | 5 | -2 | -3 | 1 | -1 | 4 | 1 | 2 | 6 | 3 | 5 | -0 |
|---|
| Accounts payable, accrued and other liabilities | 7 | -10 | 7 | -6 | -3 | 19 | -7 | 5 | -15 | 5 | 4 | 2 |
|---|
| Net cash provided by (used in) operating activities | 11 | 27 | 25 | 26 | 45 | 56 | 41 | 37 | -15 | 24 | -7 | 0 |
|---|
| Additions to property, plant and equipment | 2 | 12 | 12 | 12 | 2 | 3 | 2 | 3 | 7 | 5 | 4 | 4 |
|---|
| Additions to placement and evaluation units | - | - | - | - | - | - | - | - | - | 9 | 11 | 5 |
|---|
| Cash paid for acquisitions | - | 24 | 4 | - | - | - | - | 85 | 56 | - | 4 | - |
|---|
| Acquisition of intangibles | - | 1 | 1 | 1 | 3 | - | 1 | - | 0 | - | - | 1 |
|---|
| Net cash used in investing activities | -176 | -22 | -17 | -13 | -8 | -3 | -4 | 83 | -63 | -14 | -19 | -10 |
|---|
| Proceeds from Issuance of Other Long-Term Debt | - | - | - | - | - | - | - | - | - | - | - | 70 |
|---|
| Repayment of long-term debt | 7 | 8 | 146 | 20 | 16 | 140 | 5 | 15 | 133 | 20 | - | 45 |
|---|
| Proceeds from Long-Term Lines of Credit | - | - | 46 | - | - | - | - | 55 | 40 | - | 5 | - |
|---|
| Deferred financing costs on long-term debt | 2 | - | 1 | - | - | 1 | - | - | 1 | - | - | 1 |
|---|
| Proceeds from exercise of stock options and employee stock purchase plan | - | - | - | - | - | - | - | - | -1 | 3 | 3 | 1 |
|---|
| Net cash provided by (used in) financing activities | 142 | -6 | -14 | -10 | -24 | -38 | -12 | 34 | -95 | -17 | 8 | 25 |
|---|
| Effect of exchange rate changes on cash and cash equivalents | - | - | - | - | - | - | - | - | - | - | -1 | 0 |
|---|
| Increase (decrease) in cash and cash equivalents | - | - | - | - | - | - | - | - | -173 | -6 | -19 | 16 |
|---|
| Increase (decrease) in accounts payable for purchases of fixed assets | 0 | 2 | 5 | 0 | 0 | 0 | 0 | -0 | 0 | -0 | 0 | 0 |
|---|
| Interest | 0 | 5 | 4 | 3 | 3 | 3 | 3 | 5 | 0 | 1 | 1 | 3 |
|---|
| Income taxes | - | - | - | - | - | - | 0 | 0 | 1 | 0 | 0 | 0 |
|---|