| 2020 CHF | 2019 CHF | ||
| 01.01.20 – 30.06.20 | 01.01.19 – 30.06.19 | ||
| Net profit | –4,050,124 | –63,631,473 | |
| Depreciation of fixed assets and amortisation of intangible assets | 7,549,203 | 13,436,614 | |
| Impairment of shareholdings | –3,732,808 | –446,829 | |
| Currency effect on sale of shareholdings | 428,140 | –21,162 | |
| Net interest expense | 2,934,750 | 1,539,023 | |
| Other non-cash adjustments | 1,731,226 | –2,778,857 | |
| Change in short-term provisions | –4,566,015 | ||
| Change in long-term provisions | 718,511 | 49,154,384 | |
| Accounting losses (profits) from sales of fixed assets | 7,012 | 1,360 | |
| Income from associates and joint ventures | –151,860 | –209,473 | |
| Cash flow from operating activities before changes in working capital | 868,035 | –2,959,134 | |
| As % of net sales revenue | 0.55% | –1.22% | |
| Change in accounts receivables | –2,060,850 | 3,723,130 | |
| Change in accounts receivables from related parties | –759,183 | 1,888,507 | |
| Change in accounts receivables from associated parties | 5,286,278 | –6,939,250 | |
| Change in other short-term receivables | –3,937,735 | –10,161,580 | |
| Change in other short-term receivables from related parties | 223,841 | 66,957 | |
| Change in inventories | –16,867,534 | –10,760,717 | |
| Change in accrued income | –8,582,577 | 8,005,339 | |
| Change in trade payables | –1,811,566 | –7,898,822 | |
| Change in trade payables to related parties | –2,043,515 | –1,431,017 | |
| Change in trade payables to associated companies | –419,943 | 62,131 | |
| Change in other short-term liabilities | 3,661,178 | 624,608 | |
| Change in other short-term liabilities to related parties | –162,589 | –5,466,807 | |
| Change in accrued liabilities and deferred income | 11,511,799 | 2,218,018 | |
| Change in net current assets | –15,962,396 | –26,069,503 | |
| Cash flow from operating activities | –15,094,361 | –29,028,636 | |
| In % of net sales revenue | –9.54% | –11.95% | |
| Investments in fixed assets | –1,580,088 | –4,401,389 | |
| Divestments of fixed assets | 11,142 | 6,625 | |
| Investments in intangible assets | –87,849 | –245,187 | |
| Investments in/divestment of long-term financial assets | –58,241 | –66,766 | |
| Net cash flow from the purchase (–) / sale (+) of investments | 19,713,925 | 302,611 | |
| Interest and dividends received | 38 | 931 | |
| Cash flow from investing activities | 17,998,927 | –4,403,175 | |
| Free cash flow | 2,904,566 | –33,431,812 | |
| In % of net sales revenue | 1.83% | –13.77% | |
| Change in short-term financial liabilities | –7,219,054 | 2,395,256 | |
| Change in long-term financial liabilities | 2,832,746 | 19,493,163 | |
| Additions/disposals of minority interests in capital and profit | –38,067 | –14,096 | |
| Mandatory convertible bond | –9,122,304 | 0 | |
| Capital increase including conversion of convertible bond | 7,926,987 | 0 | |
| Sale (purchase) of treasury shares net cash flow | –100 | 235,447 | |
| Interest paid | –7,783,691 | –8,383,251 | |
| Dividend payments | 0 | 0 | |
| Cash flow from financing activities | –13,403,482 | 13,726,519 | |
| Currency translation | 43,527 | 13,330 | |
| Net change in cash and cash equivalents | –10,455,389 | –19,691,963 | |
| Cash and cash equivalents at 1 January | 20,432,282 | 30,784,059 | |
| Cash and cash equivalents at 30 June | 9,976,893 | 11,092,097 |